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Lerbyee Sport Fitness Tracker M4 Smart Heart Rate Monitor Bracelet Calories Waterproof IP67 Smart Band Fashion Watch for iOS

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Lerbyee Sport Fitness Tracker M4 Smart Heart Rate Monitor Bracelet Calories Waterproof Smart Band Fashion Watch for iOS Android Free Shipping

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Please note:
This bracelet does not require a charger and has a USB plug
Main Features:
– 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
Function :
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.
-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, Turkish)
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.

BT version:Bluetooth4.1
System:Android 4.4 and above,IOS8.4 and above
Screen:0.96 inch color LCD
Touch Pannel:Suppot
Charger:USB Cable
G-Seneor:Support
Heart rate Sensor:Support
Motor:Support
Function:24H-continuous Heart Rate/Pedometer/Blood Pressure/Distance/Calories/Sleep Monitor/Sedentary Remind/Smart Photograph/Search Handset/Time/Color Screen /Incoming call remind/Message Remind/Whatsapp Remind/Facebook Remind
Package Includes:
Smart Bracelet * 1,
Multi Language User's Manual *1,
More recommendations – //www.aliexpress.com/store/4995100

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”.

Brand Name

Lerbyee

Language

English

Screen Type

Color LCD

Waterproof Grade

Life Waterproof

Compatibility

All Compatible

Touch Screen

No

Band Material

Silica

Band Detachable

Yes

Model

M4

Application Age Group

Adult

Case Material

Plastic

Style

Sport

Screen Style

Rectangle/Square-shape

Color

Black,Red,Blue,Pink

Battery

90Ah

Systerm

Android 4.4 above, iOS 8.4 above

Standby time

3 days for daily use

Strap size

250mm*19mm*2mm

Screen

0.96 inch color screen

for

Sport,Running,Climbing,Biking,Swimming

Type

bluetooth Sport HR Smart Band

Function

Sleep Monitor,Calories,Take Photo,Steps Counting

Charging time

1.5-2 hours

Charging method

USB in-line charging

CPU

NRF52832

Type2

Bluetooth Smart Bracelet for Sport

Type3

Fashion Sport Men Watch for iPhone

Function2

Heart Rate Monitor,Step,Call Reminder

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