The millet bracelet with an initial price of only 79 yuan is the world's second-largest smart wearable device company owned by Xiaomi's Huami Technology. The former shipped more than 12 million units in 2015. And millet has also launched its new generation of products, the core improvement is - increase the time display, the price is still close to the people's 149 yuan.
In the case that the millet phone's entire packaging has become a pure white paper box, the millet bracelet 2 maintains the same kraft paper packaging as the previous generation, which is a nostalgic flavor. On the back of the production information, the machine is manufactured by Hua Mi (Xiao Mi Ecological Chain Enterprise) and the site is Shanghai Pudong New Area.
The bracelet body and strap are stored separately and the accessory has only one charging cable. It is possible to consider the cost reasons, the charger is not using magnetic adsorption, but fixed by the card position. In addition, because the shape of the bracelet became fat, it was impossible to use the charger of the previous generation of millet bracelets.
Millet Bracelet 2 is only available in black version for the time being. However, because it is a black display panel, it is very likely that there will be no other color version. Even if it is, it is estimated that it is difficult to match with the black body.
The biggest change in appearance is the magnesium-aluminum alloy front panel, which was previously only used for decorative purposes, and turned into a screen that can display time and touch buttons. Underneath the glossy plastic panel is an incompressible touch button with an aluminum alloy with a concentric circular pattern. The combination of the two materials is tight, but the tester has a slight height difference and the joints are more prone to filth.
The back-side heart rate sensor is smaller than the previous generation. Theoretically, the anti-interference ability and accuracy should be reduced. However, the heart rate sensor of the millet wristband 2 is more prominent, closely fitting to the back of the hand, and improving the anti-interference ability to some extent. The incidental effect is that the contact surface with the wrist becomes smaller and the wearing comfort is improved.
Millet Bracelet Heart Rate Edition, Millet Bracelet 2, Samsung Gear Fit
Millet bracelet 2 slightly larger than the previous generation, and there is a certain distance from the large smart bracelet.
Both generations are single-buckled and fixed, but the nails of the millet bracelet 2 are smaller, but the resistance and the tightness of the wear are close to each other and are unlikely to be broken.
The core part is designed so that it can only be taken out from the inside and it will not fly out, but it can still be "rotated" inside the strap.
Wearing comfort is mainly influenced by "weight, weight distribution, contact surface and material":
For weights that are already very light, the weight and weight distribution are not a problem. The core parts of the two generations are 5g and 7g (millet bracelet heart rate version is 5.5g). You can't see their weight on your hands. difference. While the main weight gain of Xiaomi Bracelet 2 actually originated from the wider strap, it is still very light and close to the small electronic watch;
The contact surface is surely to suffer from the loss of the wider band of millet bracelet 2, but the core part of the latter has a raised heart rate sensor, but the back of the wrist will be more comfortable;
In terms of materials, the coarse-grained 1st generation touched hands more dryly, while the 2nd generation had a feeling of skin-like coating. When sweating, there will be more obvious differences. Of course, when sweating, both were infiltrated, there would be no difference...
In general, the sense of wearing of the two generations of millet bracelets is not very different, but it may be because of the addition of the value of the millet bracelet. I personally prefer the feeling of wearing the second generation, but if you can put the watch on the matte It's even better to make bigger ones.
The core basic functions of the smart bracelet are pedometer, sleep monitoring, vibration alarm, and message reminder. Heart rate detection and time display have only begun to function since the beginning of the previous year. The emergence of the time display and digital screen began to blur the line between the smart bracelet and the watch.
The app and previous changes of the millet wristband are not big. The homepage is the information of sleep, exercise, heart rate, and "Chichi" is the function setting page (it hasn't been understood why it cannot be called "setting"). The rest is personal information and 90% of users will not open the discovery page (aggregation page for events, stores, services).
Advertising at startup
The app is also easy to use, but some of the burdensome parts, the amount is not kind, is that the app's opening page is advertising...
The sport mode supports fact data display and map mode, and records track information through the GPS of the mobile phone.
The display content of the bracelet can be selected by itself. In addition to the time, clicking a button can switch between “steps, mileage, heart rate, and remaining batteryâ€.
Millet Bracelet 2 display
Swiping on pedometer and sleep graphs allows you to see detailed data, and data backtracking is already supported, but it can only be done daily.
The hand ring is the hand, the mobile phone is the leg, and the latter is only the accounting step when they go. Therefore, the accuracy of the mobile phone beyond the bracelet is already recognized in the industry. However, the stability of the wristband is more important than the accuracy. Users will not be too concerned about whether the wristband is absolutely accurate. As long as the data statistics are stable, no matter whether it is too large or too small, the movement trend may still be reflected.
In the test, the left hand was wearing the millet wristband heart rate version and the millet bracelet 2, the right hand was wearing the Samsung Gear Fit, and then compared the step data of the mobile phone, the testing machine was the S6 edge.
The test results are still rather disappointing, once again verifying the old law of bracelets with poor step accuracy. All three wristband products have obvious deviations. The first thing to note is:
The frequency of use of the left and right hands is different. Brushing and typing may be counted in the number of steps. Therefore, the pedometer data of the two millet bracelets and Gear Fit cannot completely correspond.
The testing machine S6 edge and Gear Fit are all based on Samsung's S health. The algorithm is the same. Their data difference is basically the difference between the step count of the mobile phone and the bracelet.
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Steps and distance statistics for 4 devices within 3 days
The gap between the data of 3 wristbands and the data of mobile phones
Within five days, data statistics of mobile phone and millet bracelet 2, Gear Fit
The data gap between the two bracelets and mobile data
Regarding the problem of being oversized or undersized, the millet bracelet's 2-step statistics are the smallest, and the millet bracelet heart rate version and Gear Fit increase in turn, and the millet bracelet's ability to filter invalid actions is stronger than the previous generation and Gear Fit. However, it seems to have a unified algorithm to reduce the number of steps, in the case of many or very few steps (June 30, June 29), millet bracelet 2 has appeared to be substantially smaller.
In terms of distance prediction, when we convert the number of steps into distance, we can see that Xiaomi’s default step length is shorter than Samsung’s (personal height and weight data are consistent), resulting in the distance between the Xiaomi’s wristband and Gear Fit. The forecast gap further widened. In terms of data accuracy, everyone is just 50 steps to laugh at 100 steps...
In terms of data volatility, the millet bracelet 2 was larger than its predecessor, although slightly better than the Gear Fit, but considering the latter is worn on the right hand, the data stability of the millet bracelet 2 is not very good, especially in steps. There are particularly "extreme" situations where there are particularly many or very few counts.
The heart rate function of the millet wristband will only be turned on automatically during exercise mode and sleep monitoring. Under normal conditions, it will not maintain automatic monitoring like the 37-degree wristband, Fitbit Charge HR, and Apple Watch. In the sports record, there are only two data of the highest and average heart rate, and the fluctuation chart during the exercise cannot be seen, and the practicality is greatly reduced.
The accuracy of heart rate detection, smart watches and wristbands are basically photoelectric sensors, there will be no significant difference between them, even with mobile phone LED lights + app can also do similar results.
For wristbands/watches, the heart rate detection's fault-tolerance rate and read success rate are far more significant than precision. In this regard, the millet bracelet 2 reduces the power of the heart rate sensor (brightness of the LED lamp), which directly affects its tolerance to the use environment. When the heart rate is detected, even a simple walking will lead to a failure of the degree, and the millet hand Heart rate version and Gear Fit are much better in this area.
During exercise, we used Gear Fit, which was a good performer in the previous test, as a benchmark (previous reviews can poke the portal). Millet bracelet 2 continuous heart rate detection, in the refresh rate to lose some Gear Fit, the overall value is too large, the basic heart rate is about 65, the millet bracelet 2 will generally be 5-10. In addition, the latter often exhibits 10-15 fluctuations in data, and the data is generally accurate in terms of accuracy and stability.
Millet Bracelet 2 may be of little interest in discovering the current heart rate function. Therefore, components with lower power consumption are simply selected and the power is left on standby. This results in a further decrease in the availability of heart rate detection. However, the author actually agrees with this choice...
Millet bracelet heart rate version, millet bracelet 2, Gear Fit sleep statistics on the same day
The first generation of millet bracelets has been able to automatically determine the user's sleep time and turn on sleep monitoring, which is much better than the manual recording of Gear Fit (Samsung is not willing to give Gear Fit a firmware update).
Sleep was not very stable that night, although the result was the same hand, the sleep process recorded by the two generations of millet bracelets was obviously different, and the difference between them and Gear Fit's icon was even more obvious.
In terms of sleep monitoring accuracy, millet bracelet 2 is significantly higher than the previous generation (more recordings of waking up indicate higher sensitivity adjustments). But including Gear Fit, their charts are too simple.
Sleep time statistics (Gear Fit, the data is the sum of "light sleep" and "light sleep")
Sleep time statistics
Sleeping and waking time: directly comparing the data of the two generations of millet bracelets, their sleep and wake-up time statistics are almost completely coincident, and the accuracy is high, which is worthy of praise.
Statistical results: There are certain gaps in the sleep statistics accuracy and Fitbit of several wristbands, and low accuracy also leads to no regularity in their detection results. For shallow sleep statistics, the statistical values ​​of two generations of millet bracelets are relatively close. However, as long as the night is not very stable, the data recorded by the situation is more complicated. The result of the three bracelets will be several tens of minutes.
Because there is no reference object, it is impossible to confirm who is the most accurate reflection of the truth. However, the overall tendency is that the sensitivity of the millet bracelet 2 is higher than the Gear Fit, but lower than the millet bracelet heart rate version (the higher the sensitivity, the longer the shallow sleep time and the shorter the deep sleep time). Fortunately, although the error of deep sleep statistics is huge, in the shallow sleep statistics, the gap between them is within 1 hour.
Time display
For the bracelet, increasing the time display is a huge improvement in practicality. At least some of the data can be directly viewed, and you can usually wear it without exercising.
Brightness: The OLED screen does not support brightness adjustment, brightness is normal. The advantage is that it will not be too bright in power saving and darkness, but it can also be seen in sunlight when the sun is slightly blocked.
Raise the hand bright: The trigger sensitivity is very high, can turn on or raise the hand almost can all light, but the main problem is in the screen speed. Lifting hands is slower than Gear Fit. The latter is already a slower level. The entire triggering process must wait for more than half a second, often causing you to have the illusion that “there may not be enough movement, no triggerâ€. Discounted
Touch screen light: The sensitivity of the touch screen is very high. Light pressure can be used to light the screen. All metal, water, and sausages cannot light it. The light screen speed is much higher than that of the hand-raising light mode. Because the screen is too slow to lift the hand, so I usually directly touch the screen bright screen ... ...
Inadvertently touch: It is very easy to trigger by raising the hand and the chance of accidentally lighting up is usually high, but the screen is only 5 seconds. In addition, continuing to click on the screen will only switch between different content, and the additional power consumption is not much. However, it is worth noting that, after the heart rate display is turned on, the heart rate will be forcibly started every time it is clicked, and the power consumption will be relatively large. In addition, the failure rate of the test is too high. Almost only when it stops completely can there be a reading. The practicality is too low. The daily use suggests closing the heartbeat display.
Vibration amplitude/perception: The default is 3 consecutive vibrations, which is slightly weaker than the previous generation. Under normal wear and tear, people feel enough. However, users who are too sleepy are still powerless. If there is an alarm, it is recommended to set multiple alarms.
Message Alert: Support for phone, SMS, and third-party app notifications. The latter can also choose the apps that they can notify. This is better. However, due to limited hardware, users can only be alerted through vibration and simple icons on the monitor. They cannot view details and are less likely to reply. In addition, it is easy to ignore the vibration of the wristband when walking and it is practical.
Sedentary reminder: If no activity is detected within 1 hour, it will vibrate and remind the user to supervise the user's activity. You can set the reminder period and the no-interference time at noon. The setting is still very concise. The measured effect is far more meaningful than the notification reminder. This function can be always on.
Looking for a mobile phone: It is a vibrating button, and it is still a little bit of a shock. If it falls on a sofa, this function will be weak, and we can only say that it is better than nothing.
Connection: Millet Bracelet 2 will take some time apart from the first binding, and Bluetooth will not be a problem for the rest of the time. The effective connection distance is about 6 or 7 meters, which is acceptable.
Life: The official logo is used for 3 weeks. In actual use, 3 alarm clocks are sent a day but the notification is closed. The power loss of the bracelet is about 5% per day, which is close to the nominal value. However, if you turn on the push and the message is high, the battery life will definitely Obvious drop. This endurance performance is lower than the first generation, but far better than 10 days of life level of the millet bracelet heart rate version, you can do so that you ignore the charging point.
It is worth noting that although 10 days of battery life and 3 weeks of battery life are all much better than the smart watches, they all look slightly different. However, the battery life after the low-power reminder has a huge impact on the experience. The same 15% of the remaining power, millet bracelet 2 enough to adhere to 3 days, no problem with normal business trips, and millet bracelet heart rate version will start looking for a charger.
Charging: charge from 0 to 100% in 1.5 hours - 2 hours, normal speed 
Maintenance: At the beginning of use, the author unconsciously thought that its easy-to-mirror mirror and buckled aluminum alloy paint were easy to lose paint. However, in fact, in the first half of the month, the first thing to scratch was actually the strap (the mirror was slightly scratched). After all, the area of ​​the strap is much larger than that of the front mirror and the buckle, and the chance of scratching is usually high. In addition, the matte grain size is smaller, and the softer strap also makes the millet bracelet 2 easier to show scratches than the previous generation. Of course, the bracelet is not expensive, and it is still black, it is not obvious to spend, do not feel bad.
The core flight: the previous generation has the risk of a core flight. Many users report that the core of the game has come back to the bracelet... and the millet bracelet 2 is designed to only take out the core inwards. Strong, almost impossible to fly off.
Millet bracelet 2 updated the appearance, increased the time display, price comparison doubled in the first generation. However, it is still the biggest manufacturer among the 149 yuan, the cheapest smart bracelet with time display.
The ease of scratching, pedometer accuracy, and heart rate availability are all clear issues, but the availability of sleep monitoring, shock alarm/information, and sports alerts are high. Of course, it's the biggest improvement or that time display. For such a degree of completion, 149 yuan is a price that cannot be bought without losing. However, the ability to grab the original price is another problem.
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