How many days of data can Xiaomi Mi Band 2 store?

If it is not synchronized to Xiaomi Sports, the information in the bracelet can be stored for 7 days, and will be cleared after 7 days.

Xiaomi Mi Band 2 was officially released by Xiaomi on June 2, 2016. It is priced at 149 yuan and will go on sale at 10 a.m. on June 7. Compared with Xiaomi Mi Band 1, the main improvement is to add a display screen, and touch the front button to display time, heart rate, steps, calories and other information

The following is a summary of the functions of existing wrist-based products Let’s discuss them one by one.

1. Step counting

Currently this is the basic configuration of the bracelet, with 100 standard functions.

Can a bracelet that can’t count steps still be called a bracelet? Maybe it should be called salted fish without dreams.

Smart wrist products were born from the concept of health, and this function is the core function. Most manufacturers use a 3-axis g-sensor, and some add a magnetometer, which can filter out some interfering factors, such as driving, typing on the keyboard, simply shaking hands, etc. Gyroscopes currently consume relatively high power and run out of power after a day or two, so no one uses them. For Fitbit, which sells for more than 1,000 yuan, or domestic bracelets, which sell for 79 yuan, they all use similar sensors.

This demand is actually very important for Chinese people who currently generally exercise too little. Unfortunately, most people who need to exercise do not have time to exercise. This cannot be solved by one product. There is a problem, we can only take our time.

2. Sleep monitoring

This function seems to be liked by many people, but unfortunately there are not many good ones now.

Theoretically speaking, wrist activity can be detected with an accuracy of 90%. Unfortunately, there is very little research on this in China. A few products (including Fitbit, Jawbone, and Xiaomi 2, of course) can accurately detect falling asleep and waking up. , but the accuracy of deep sleep is questionable. Some manufacturers now use piezoelectric films laid on the bed for detection, which is more accurate than a bracelet, but the results are still questionable and they have not gone through a lot of verification to prove their accuracy.

3. Reminders

The core of Android Wear’s design is reminders.

Whether it is the Android Wear system, the Pebble-based ARM small system, the MTK system or Samsung's Tizen, this is currently the core application. WeChat is moving very fast in this area. The gradually opening of hardware interfaces is expected to directly connect WeChat voice message reminders to hardware, which I believe will drive a large number of hardware sales. In foreign countries, pebble is the most successful crowdfunding project in the history of kickstart, which is not without reason. In China, among the customer base of Xiaomi and Aiwei (the picture above is from Aiwei bracelet), 90% of customers are extremely concerned about this function. This is also the purpose of most domestic users to buy wearable products.

4. Voice call

A portable Bluetooth sports bracelet headset.

As for voice calls, it seems that when domestic mobile phones became popular 7 or 8 years ago, many manufacturers made early wearable products such as watches and mobile phones, but they have never been very popular.

After the wearable concept suddenly emerged in the past two years, these manufacturers were reborn, and suddenly realized: It turns out that we were too early.

There has been no consensus on whether the phone call function is necessary to be placed on the wrist. Judging from the release of several Samsung products, Samsung still believes that phone calls are a necessary function. There are currently three methods. One is to directly build in the SIM card, using MTK's solution or Qualcomm. The second is the Bluetooth headset method, which takes over the call function of the mobile phone. The third method is Bluetooth hands-free calling.

Judging from the current market, all three methods have a large market. Watches released by Samsung and LG have built-in calls. Bluetooth headset methods include Huawei, Aiwei (soon to be released), and Bluetooth headsets. method, gradually moving the call function to the wrist. This frees up the number of times the user operates the mobile phone, and makes the call operation more convenient for the user.

This is a necessity for some users who often need to drive, and the hot sales of Huawei B1 prove this. There are many low-end bracelets and watches for hands-free methods. They are exported a lot and the demand is extremely strong. Their appearance is more suitable for the rough European and American style.

5. Decoration

Used as watches and decorations, this is actually quite important.

But since ancient times, there have been no such wonderful things: beautiful appearance, complete functions, and energy saving.

It is difficult to find a balance between technology and aesthetics. Some manufacturers choose to give in to aesthetics and functionality, putting appearance first. Some manufacturers choose to pay equal attention to functionality and aesthetics.

Hey, friends who want to get involved in sex, please be more open-minded. This is just like finding a wife. If you choose between someone who is beautiful, sexy and capable, which one do you choose?

6. GPS positioning

This function is almost indispensable for parents with children and young people with elderly people at home.

There are also some running enthusiasts who like the GPS route function of their bracelets.

Groups with weak self-protection capabilities such as the elderly and children are in great need of this product. At present, the MTK GPS module is mainly used, and Qualcomm's is also used, all of which are modified from mobile phone solutions. There are many companies currently making GPS bracelets with positioning, but not many are doing well. Therefore, users who have urgent needs need to carefully understand that battery life and power consumption are currently the most troublesome thing.

7. Sports guidance

This is more of a professional field, and gyroscopes are generally used to record trajectories.

This market is currently a niche market. After all, the demand for professional analysis in sports is not yet mainstream. However, from the perspective of technological development, smart wrist-based products must achieve a certain level of professional sports guidance. Therefore, I think that with the development of technology, this function will gradually become a basic function in about 1 or 2 years.

8. Health applications such as heart rate and blood oxygen

This function is currently being worked on for wrist-based products.

Heart rate bracelets are already relatively common, but blood oxygen function bracelets need further optimization.

Everyone thinks it is very useful, but technological development lags behind demand, or to be more precise, the progress of commercialization of scientific research results lags behind market demand. Most of the devices currently on the market can be measured with one hand. Heart rate bracelets all use the photoelectric PPG method for measurement. They have a certain degree of accuracy when stationary, but there is basically no accuracy in dynamic measurement during exercise.

Products that can reach medical level must integrate and collide with multiple industries. This process will take some time, but it will definitely happen. This direction will be the mainstay of wrist-based products.

9. Social interaction

The importance of social interaction needs no further elaboration. Just look at WeChat’s user base of over 800 million and you’ll get it.

As for how wrist-based products can do a good job in social networking, we still need to explore. Not only do we need to avoid existing social giants, but we also need to explore the combination of hardware and social networking. We cannot socialize for the sake of socializing.

And the type of social networking must have its own characteristics. For example, DingTalk is a business social network and will be used during working hours; Momo is jokingly called a hookup social network; WeChat and QQ are social networks that have been integrated into ordinary people's lives. .

With social functions, people will flow in, and with users, there will be dividends.

Many companies are exploring this point. The pioneers are also groping, and the gaps left by the giants are still relatively difficult to find.

10. Power consumption

This is very important for user experience.

Theoretically speaking, there is no need to mention it separately. The manufacturer defaults to doing it well. Of course, the longer it is used, the better. However, the current power consumption of wrist-type products is fatal. If the power consumption cannot be reduced, wrist-type products will lose their meaning. But power consumption is closely related to functionality. Functional convenience cannot be sacrificed for power consumption. This requires a smart balance. Some bracelet products without a screen can be used for half a year, while those with a screen can generally only be used for 3-20 days due to the use of OLED screens.

Bong chose to achieve the ultimate in battery life, so it sacrificed the screen and many other power-consuming functions. This depends on each manufacturer's definition and understanding of the bracelet.

11. Situation recognition

These functions such as games are still in the experimental stage, and there is no mature market application yet.

The guinea pig somatosensory bracelet mainly uses mobile somatosensory to play somatosensory games.

As a famous investor, Wu Xiaobo, Guinea Pig Bracelet also launched a somatosensory gaming bracelet in June priced at 600 to 700 RMB. I believe that Wu Xiaobo, as the author of The Great Defeat, will have his own understanding.

It turned out afterwards that this bracelet was like a flash in the pan, and then there was no big movement again. It actually adds an explorable direction to the bracelet world.

12. Mobile payment

Swiss bracelet represents the demand in this direction.

However, there are many giants in this market. As one of the payment terminals, the bracelet needs to cooperate with the direction of each giant. At present, the sphere of influence has not been separated, so we can only wait and see. Apple Watch has already made efforts in this area. The actions of large companies usually represent the direction of the industry. I believe this will be a very good direction and worthy of attention.