Longet Smart Watch M4 Heart Rate Monitor Waterproof Fitness Watch Blood Pressure Bluetooth Smart Bracelet for iPhone Xiaomi Free Shipping Support Dropshiping
Please note that you can purchase the strap of the M4 watch, please open this link——M4 strap
1.This bracelet does not require a charger and has a USB plug
2.You can't put it in water and can't swim with it The bracelet can't touch the hot water because the hot water has water vapor.
3.The bracelet is an international version, only English, but the content of the message will synchronize the language of the phone（Support English, French, German, Japanese, Spanish
Italian, Korean, Russian, Czech, Portuguese, Turkish, Hebrew, Greek, Latin, Vietnamese, Danish）
-APP support language:1.andriod(English Czech German Spanish French Italian Japanese Korean Portuguese Russian Thai Chinese) 2.ios(English, Chinese, Japanese, Korean, Spanish, German, French, Portuguese, Italian, Russian, Polish)
– Bluetooth Synchronization
With Bluetooth 4.1, this smart bracelet is available for smartphones with Bluetooth function
– Professional 24H-continuous Heart Rate Detection
Whether you are resting or doing sports, detect your heart rate accurately
– Intelligent Anti-lost
Watch will send an alarm after leaving the mobile phone in a certain distance, no need to worry about losing your phone
– Sport Monitor
This smart bracelet can record steps, calories and distance, so you can know your sports data,adjust your exercise program and live a healthier life
– Sleep Monitor
Accurately monitor total effective sleeping time and motion time every night, helping you develop good living habits
– Sedentary Reminder
Develop scientific habits and effectively resist sub-health
-The bracelet is an international version, only English, but the content of the message will synchronize the language of the phone（Support English, French, German, Japanese, Spanish, Italian, Russian, Czech, Portuguese）
MAIN FUNCTION- 24H-continuous Heart Rate/Pedometer/Distance/Calories/Sleep Monitor/Sedentary Remind/Smart Photograph/Search Handset/Time/Color Screen display/Incoming call remind/Message Remind/Whatsapp Remind/Facebook Remind, etc.
Key Specifications – Bluetooth 4.1. Supports IOS 8.4 or above ; Android 4.4 or above (Download APP from Apple Store or Google Play. Smart phone only, not for PC or Tablet). In addition to the iPhone5 series
High quality polymer rechargeable battery guarantees long battery life
Bracelet language– Sync with your phone language OR English.
System:Android 4.4 and above,IOS8.4 and above
Screen:0.96 inch color LCD
Heart rate Sensor:Support
Smart Bracelet * 1,
Multi Language User's Manual *1,
For the problem that the bracelet can measure the heart rate in things and in the air, the following explanation is made:
1.At present, the mainstream heart rate bracelets on the market adopt the same measurement method. The principle is not complicated, that is, the PMG signal of the radial artery is obtained by the reflective photoelectric measurement method, and the fast Fourier transform is performed on the PPG signal to analyze the frequency domain. To achieve the detection of the human heart rate. To put it simply, it is to use a light to the artery and then reflect it back. Based on the change of the reflected light, the heart rate of the human body is calculated.
2.Due to many factors such as the physiological structure of the human body, the color of muscles and blood, green light is the color with the highest passing rate in the human body. Therefore, the light source of the heart rate sensor uses green light to achieve minimum loss and interference.
3.Heart rate wristband detection focuses on human tissue. Some data is also read for non-human objects. This is a known and normal phenomenon. After the data is based on the principle of light reflection, the heart rate detection will have a reading. This situation cannot be All avoided, so there will be problems with heart rate data in the case of heart rate bracelet (table) in the case of “air test”.