The smart bracelet is one of the most widely used wearable smart devices. The brand of smart bracelet launched by domestic and foreign manufacturers is dazzling. Compared with foreign smart bracelets that are often hundreds or even thousands of yuan, most domestic brands are priced between tens of yuan and more than 100 yuan. In October 2016, Lexin, a domestic smart hardware manufacturer, launched its latest smart bracelet Ziva, with a listing price of 399 yuan. What makes Ziva so different? The author is very interested in this. Now, let me reveal the secrets for you and show the uniqueness of Ziva.

Part 1： Packaging, slightly excessive

The most conspicuous part of Ziva's packaging is the bracelet pattern worn on the front of the hand. It can be seen from the comparison of real objects that the design is larger than the bracelet body. A layer of protective film is pasted on the bracelet screen to prevent the screen from being scratched during transportation.

The box is very large, and the author mistakenly thought there were other accessories. While trying to pull out the contents of the box, he was still wondering how Le Xin designed the package to be so difficult to disassemble. The result was a joke. It was glued with glue, and there were no accessories.

Compared with the packaging box of Huawei Changxiang 6 mobile phones, we know how big Ziva's packaging is. Personally, I think it's a bit over packed. I can make the box smaller.

Part 2： Wear it, please use the correct posture

Tap the touch area on the right side of Ziva screen, and you will be prompted to bind the bracelet with the App first. Scan the QR code on the manual to download and install the Lexin Sports App.

New users can register Lexin account or log in directly with WeChat. The bracelet can only be bound by scanning the code. The author thinks it is more convenient to bind the bracelet directly through Bluetooth connection.

Ziva's correct wearing posture is that the touch key is facing the inside of the body, and the bottom should be close to the skin. The distance between the bracelet and the wrist bone should be less than 2CM, otherwise the accuracy of heart rate measurement will be affected.

Part 3： Trial use, comfortable and easy to use, showing humanized design

Lexin Ziva adopts metal frame and nano injection molding process, and is equipped with imported calf leather wrist strap. Compared with most smart wristbands made of TPU material, Ziva's wristband leather is fine and comfortable to wear. The separation of Ziva and the wrist strap is very simple. Press the horizontal line mark on the wrist strap to take it out. One side of the place connected to the wrist strap is ingeniously designed as a USB socket, and the other side is engraved with Ziva's SN number. The wrist strap can be installed according to your habits, regardless of the left or right.

Previously, the Misfit Ray bracelet was used, which has high appearance, but poor interaction experience without screen. Ziva is equipped with a 0.87 inch OLED screen. The screen is made of PC and has a hardness of 3H, which is higher than the ordinary bracelet screen. Ziva can not only light up the screen by touching, but also automatically recognize the lifting action to light up the screen, with a very high recognition rate. For the author who doesn't like wearing a watch, it is very convenient to watch the time without taking out his mobile phone. Ziva can also set the wearing habits, with your left hand and right hand as your choice.

It is really awkward to see the content of the screen horizontally on the rectangular screen, although it can make your head move more. Lexin has considered for us that not only Ziva can be set to the vertical screen mode, but also the display content and order can be set. Turn on the night mode, and you will not recognize the unconscious hand raising to light the screen when sleeping; The brightness of the touch lit screen is also much lower than that in the daytime, and the time of waking up in the middle of the night will not be dazzling. This setting is very considerate.

Ziva can also set multiple alarm clocks and enable the functions of long sitting reminder, call reminder and message reminder. The alarm clock vibration time can be selected from 5-60 seconds, which is suitable for different environmental occasions. Long sitting reminder is a necessary function for office workers. However, the reminder frequency cannot be customized. The minimum is 1 hour, which is a little longer. If you have the habit of taking a nap in the afternoon, the reminder of sitting for a long time will also disturb people. It is better to set the opening time separately. After the call reminder is enabled, you can directly press the touch area of the screen to reject the unwanted call. For WeChat, QQ and other software information, there will be several unread messages on the screen. When there are short messages, the screen will display not only the name of the contact person, but also the content. It is difficult to read long messages because the screen is lit for a short time.

Part 4： Monitoring, to be improved

1、 Heart rate detection

When continuous heart rate monitoring is enabled, the photoelectric heart rate detector at the bottom of the bracelet will emit a flashing green light to detect heart rate. If the bracelet is not worn on the hand, the detection will automatically stop after about a minute. On Saturday, December 3, the noon was when the author and his family were playing outside. It can be seen from the heart rate chart that the heart rate at that time was maintained at a high state. When taking a bath in the evening, I took off the bracelet, so there was a period of blank. Since there is no other heart rate detection tool, it is impossible to compare the accuracy of heart rate detection data.

2、 Sleep monitoring

Ziva does not need to set the sleep mode manually and can automatically monitor sleep. You can view the sleep status of the day, or switch to the report mode to view the statistics by day/week/month. However, Ziva's monitoring is not accurate. The first night when I wore the bracelet, I didn't sleep well that night and woke up several times, but the bracelet did not detect the inventory status. What's more strange is that the sleep time after waking up in the morning is different from that after waking up after playing for a while. While I was writing the report last night, it was always at 0:28. Today, I checked the sleep time from 23:34. The Ray bracelet used before is much more accurate. Consult the customer service of Lexin, saying that the sleep state is calculated by detecting the movement of the bracelet. Ziva has the function of measuring heart rate, heart rate and movement to determine whether sleep is more accurate?

3、 Step counting/motion monitoring

Usually, due to the limited time, I seldom do sports and exercise specifically. I jog in the community at night. Ziva's motion monitoring function is relatively simple. At present, it can only monitor running, which is suitable for people like me who have few sports events. In order to test the accuracy of the sports data, I compare the data of Yue Running Circle and Le Xin Sports. The left side of the first picture is the starting data recorded by Ziva, with the kilometers of 5.35KM and the steps of 6674; On the right is Yue Running Circle. The following figure shows the data after the run. The data recorded by Ziva is 1581 steps, 132 steps, 1.5KM in total, and the data of Yue Running Circle is 1691 steps, 149 steps, 1.52KM in total. The mobile phone is equipped with GPS and network positioning, so the mileage of Yuepao lap is quite accurate, while Ziva is only 20 meters away, which is very difficult. In addition to the difference in algorithm, there is another factor in the difference in steps and heat consumption between the two. The mobile phone is put in the pants pocket, while Ziva is worn on the hand.

It should be noted that Ziva's movement must last for 5 minutes or more before it can be recorded, otherwise it will only be recorded in the movement. Although it is for the accuracy of motion data, this time is too long.

Part 5： To sum up, whether to be cost-effective or competitive

Ziva has only been charged once in more than a week of trial use, and the charging time is about one hour. If continuous heart rate monitoring is enabled, it can be used for 5 days, and if it is not enabled, it can be used for 30 days. As the flagship bracelet, Ziva is quite satisfactory in appearance, comfort, ease of use, and endurance, but it is far from perfect. Accustomed to the 1080P/2K resolution screen effect of the mobile phone, Ziva's screen display is jagged, and the effect is not satisfactory. If you can customize the time of screen lighting and extend the time of SMS reading, the use experience will be better.

In terms of function, Lexin Ziva is no different from its own Mambo 2. Both of them are equipped with OLED screen, which can be used for automatic detection and life waterproof. The difference mainly lies in the appearance and material. The price of Mambo 2 is 169 yuan, and Ziva is 399 yuan, more than one time the difference. How would you choose?

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