Today, intelligent wearable devices are no longer superior, and they have become more and more popular, and their types and functions are also increasing. Smart bracelets and watches are more common. Today, let's introduce this intelligent wearable device - Demon Lover CoBnd K4.

Unpacking

On the product packaging, the design is relatively simple, but I still prefer this simple design style, with "Smart Band" printed on the lower front, There is a white adhesive paper printed with product parameters on the bottom of the back. Of course, the green adhesive paper on the front is a special logo for machine trial. However, when I got it, there was no plastic packaging film on the outside of the entire package. I don't know whether it was unsealed or torn off during shipment.

It can be seen from the parameters that I got the white version. According to the official data, this product has a variety of colors in the design. In addition to the white I got, there are pink, yellow, blue, black and orange. Of course, if I don't like it, I can buy wristbands in other colors.

The internal design of the packing box is relatively compact. The host is fixed on the foam board, and there are openings on both sides of the foam board, so it is convenient to take out the wrist strap, charging line and instructions under the foam board.

The packaging, charging line and host design of the product are similar to that of the second generation Xiaomi smart bracelet. However, it is worth mentioning that in terms of the selection of fixed body materials, the Demon Lover is more careful. With the use of foam boards, the cushioning and fixation are relatively firm.

The white wristband design looks beautiful, but its disadvantages are also obvious. Whether you wear long sleeves or short sleeves in summer or winter, the white wristband will inevitably be contaminated by clothes or other things, become gray, and it is also very boring to clean, and it can not be cleaned as it was before. I wonder if you have any good cleaning tips, Welcome to leave a message to share.

The whole body is black, and the front is a 0.86-inch OLED large display screen. Below is a touch button. Touch the button to switch the screen display information, and the screen can switch between horizontal and vertical screens. However, this function is set in the App intelligently. According to the trial in recent days, the horizontal and vertical screen switching optimization is not very good at present, and the phenomenon of automatic horizontal screen occasionally occurs. In addition to displaying sports data, it can also display incoming calls, short messages QQ、 WeChat and other information notifications.

The protrusion in the middle of the back is the heart rate detection sensor, and the side is two metal pads. These two metal points correspond to the metal spring contact points on the charger.

It can be seen from the side that the edge of the screen protrudes outward to fix the body on the wrist strap. However, when the light is sufficient, the screen edge can see obvious blue. At night, after the screen is lit, the side of the body leaks light seriously, and the front can clearly see the fixing point behind the screen. It is hoped that the manufacturer can consider optimization during mass production.

Airframe comparison

In order to ensure the fairness of the comparison and evaluation, I selected the Weile Now2 bracelet and the Demon Lover CoBand K4 for comparison and evaluation. The two bracelets are basically the same in functional design, so they are used for comparison and evaluation.

Demon Lover CoBand K4: The body design is round, with a 0.86-inch OLED screen on the front, which is integrated without obvious gaps, and a touch button is designed to switch the screen display content or functions and switch the machine on and off; The back is centered and equipped with a heart rate detection sensor. Below is a heart rate icon; The side part is recessed and fixed on the wrist strap.

Weile Now2: The square design of the body is matched with a 0.91-inch capacitive touch screen on the front. The screen is made of glass, so there is a clear gap between it and the outer edge of the screen. The touch screen can switch the display content and functions, without switching on and off functions; The back is centered and equipped with a heart rate detection sensor. The top is the Weile logo, and the west is four metal contact points to connect the charger for charging; The side part is recessed and fixed on the wrist strap.

Charging line comparison

Demon Lover CoBand K4: The design of the charger is the same as that of the millet bracelet. It adopts the pull in half surround design. The wire material uses a thin wire with moderate softness. The whole charging line is formed in one piece, without losing accessories; There is no sign on the USB interface. In terms of design, I feel that the outer plastic is a little thin, and the edge treatment is not circular enough, so the cutting feel is strong.

Weile Now2: The whole charger is divided into two parts: the charging line and the charging stand. The charging stand adopts a bayonet design. When charging, you can directly charge without taking the body off the wrist strap; The USB interface is printed with data marks, so it feels heavy in design.

Wrist strap contrast

Demon Lover CoBand K4: white wrist strap, smooth surface, poor elasticity and softness, uncomfortable touch, high hardness, hard pulling, no deformation of wrist strap; The wrist strap buttonhole is relatively small, so you need to press the buckle hard to fix it; It is hoped that the manufacturer can consider optimizing the design on the flexibility of the wrist strap during mass production later.

Weile Now2: The wrist strap is black, with textured surface design, good elasticity and softness, comfortable to touch, hard pulling, and no deformation of the wrist strap; The buttonhole is relatively large, so the buckle can be easily fastened when wearing.

App functionality comparison

Demon Lover App: The data information on the home page is too simple, only the data of sleep, heart rate, weight, walking, etc., but the data information of sitting for no time. Although the device has the function of sitting and lying for a long time, the App does not have such data; In terms of functions, heart rate measurement can be operated on the App, or it can be started by pressing the touch button on the heart rate interface for a long time, but the test seems to be inaccurate. During the measurement, if you do not touch the button manually to stop the measurement, the heart rate will be measured all the time. The instructions given in the manual are 15 seconds, but the actual measurement does not stop automatically; The flip wrist light screen function can be designed to be turned off or turned on at the App end, but when the flip wrist light screen test is carried out with both worn on the same wrist, the light screen speed of Demon Lover is slightly slow. It is unknown whether the light screen speed can be improved through the firmware upgrade of the body in the later stage; It is worth mentioning that the Demon Lover can set the screen lighting time on the mobile phone, but this function is not available in Weile; In terms of data sharing, at present, the App does not have access to WeChat and QQ account sharing, and we hope that this function can be added later; Currently, the bracelet can push WeChat QQ、 Calls and SMS content, but does not support harassment interception and other functions; In terms of compatibility, I currently use Xiaomi Note 2. When I download the Demon Lover through the manual, the system will prompt me about non security software, and sometimes the software will appear FC.

Weile App: The home page data is relatively detailed. Each item of various data is listed separately. You can view the corresponding data information by sliding up and down. It is worth mentioning that you can see how long the wearer has been sitting and lying without exercising; In terms of functions, since Weile Now2 is a touch screen, many functions can be operated on the screen; The compatibility of the app is good, but it may be due to system restrictions. If you want to push information, you need to set the system settings before you can open the corresponding message push.

Waterproof and endurance

Demon Lover CoBand K4: The instruction manual shows that the waterproof level is life waterproof, that is to say, when the wearer washes his face, bathes and other activities in daily life, it will not have a big impact on the device. The manufacturer recommends that he should not wear it when swimming. In terms of endurance, when the Bluetooth connection with the mobile phone is disconnected, he will not receive information push from the mobile phone. At this time, he can stand by for about 10 days, This is not much different from the manufacturer's suggestion. However, if you keep the device connected to the mobile phone, the device will always receive information push from the mobile phone. At this time, the device can be used normally for about 7 days.

In general, the smart bracelet CoBand K4 of Demon Lover can fully meet the needs of people's use scenarios in terms of the functionality, waterproof and endurance of the device in terms of daily movement data recording, but the compatibility and functionality of the app end need to be optimized and improved.

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