Smart bracelet with Heart Rate Monitor, Fitness Watch color screen Fitness Tracker with Sleep Monitor for Men Women Kids


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keeping track of your performance and increase your health with the Letiket M4. This stylish all-black heart rate monitor packs an abundance of fitness features that help you keep track of your exercise routines and supports you in reaching your future fitness goals. With its lightweight design, the bracelet suits to wear at any occasion. Whether you’re simply using it to keep track of the time while in the office, or as your personal fitness coach during your exercise, this sports watch will not let you down.

【Every Heartbeat Matters】 The M4 continuous & automatic heart rate sensor monitors your heart rate all the time without manual measurement, and display on this large colorful screen. Your heart rate indicates your fitness level to help you adjust breath.
【Track Steps and Calories】Upgraded algorithm in processing unit help you track steps, distance and calories more accurately. Keep motivated for every move, embrace fitness lifestyle using the activity tracker feature in GT101 fitness watch.
【Better Sleep Better You】 The sleep monitor automatically track your sleep duration and gather all data in the App, take action to improve your night and make the most of a day. Set up silent alarm in the App and wake up in fresh mood.
【Get Notifications On Your Wrist】Set up your notification preference in App, get vibration alerts for calls, messages, facebook, twitter and more. Sedentary reminder even will encourage you stand up regularly. Lift your wrist and receive updates, focus on a no-interruption workout.

Main Features:

●Nordic 52832 Bluetooth 4.0 chip, low consumption and fast-paced

●IP67 waterproof, not afraid of rainy days or any outdoor activities

●0.96 inch TFT color screen, show you high resolution images

●Kinds of app notifications, Facebook, WhatsApp, WeChat, Line, QQ, Skype, Twitter

●WearFit 2.0 app, check your health data on your phone


Button: one-touch
Step counter: Support
24h/12h time format selection: support
Mileage: Support
Calories: Support
Sleep Monitoring: Support
Heart rate: support
Alarm: Support
Continuous Heart Rate Monitoring: Support
Sedentary reminder: Support
Blood Pressure: Support
Stopwatch: Support
Find bracelet: support
UI interface selection : support
Music control: support
“Call, SMS, WeChat, QQ, skype, whatsapp, facebook, linkedin, twitter, viber,line notification alert”: Support
Shake Photograph: Support
Find the phone: support
Factory reset: Support
Historical Information View (last 3): Support OTA Support
Charging connector: usb direct charger
Product languages: Chinese (Simplified, Traditional), Japanese, English, French, German, Italian, Spanish, Russian, Portuguese, Polish, Malaysian
APP Language: Chinese (Simplified, Traditional), Japanese, English, French, German, Italian, Spanish, Russian, Portuguese, Korean, Malaysian

Brand: Letike

Bluetooth Version: Bluetooth 4.0

Language: English,French,German,Italian,Japanese,Korean,Portuguese,Russian,Simplified Chinese,Spanish,Traditional Chinese

IP rating: IP67 (can’t swim can’t shower , can be wash hand )

Screen type: TFT

Operating mode: Touch Screen

Compatible OS: Android,IOS

Compatability: Android 4.4 or above,iOS 8.5 or above (support iphone 6 or above)

People: Female table,Male table


Type of battery: li-ion battery

Battery Capacity: 90mAh

Standby time: 7 days

Charging Time: About 2hours

use time : 3-5 days

Dial and Band

Shape of the dial: Rectangle

Case material: PC

Band material: TPE

Weight and Size

Dial size: 48mm x 20mm x 11.6mm

Product weight: 0.0250 kg

Package weight: 0.1400 kg

Product size (L x W x H): 26.80 x 2.00 x 1.16 cm / 10.55 x 0.79 x 0.46 inches

Package size (L x W x H): 12.70 x 8.70 x 3.10 cm / 5 x 3.43 x 1.22 inches

Package Contents

Package Contents: 1 x Smart Bracelet, 1 x English User Manual

Standard Packing:


Charging cable*1


Step Calories Counter

Automatically and accurately track your all day steps,calories,distance and duration time.

Heart Rate Monitor
Accurately track your heart rate all day, help you know heart rate status and make adjustment to your lifestyle and workout
Sleep Monitor
Automatically detect your sleep at night and provide you with deep sleep,light sleep and wake up time.
Multiple Sports Tracking
like walking, running,help you track your various of workout
Connected to GPS
Check your running path directly in the app.
Check Call & Message on Wrist
Connect this tracker with your smartphone,then you can just check call,messages and social app message just on your wrist,never miss any thing important

Remote Camera Capture

Just touch the key on the watch,capture the unique moment

Built-in USB Charging & Long Batter Life
Built-in USB plug enables you to charge without charging cable,very convenient.A full charge can support 3-5 days using time.

Inside Newest chip NRF52832 , More faster and stable

Configure 3D acceleration sensor , just lightly rotate 30-80 degrees , the screen will smart awake up

Additional information

Weight0.1 kg
Dimensions10 × 10 × 10 cm

Passometer,Sleep Tracker,Push Message,Heart Rate Tracker,Alarm Clock,Speed Measurement,Fitness Tracker,Message Reminder,Call Reminder




All Compatible




IOS,Android Wear,Android OS





Rear Camera


Network Mode




Multiple Dials




SIM Card Available


Waterproof Grade

Life Waterproof

Band Material

Silica Gel

Case Material


Screen Shape


Application Age Group




Battery Detachable


APP Download Available


Band Detachable


Brand Name



Android 4.4 / iOS 8.0 and above system

Battery Type

Lithium Polymer Battery

Battery Capacity


led size


Strap size

26.80 x 2.00 x 1.16 cm / 10.55 x 0.79 x 0.46 inches

Bluetooth Version

Bluetooth 4.0

Waterproof Rating


Feature 1

heart rate monitor Fitness Tracker

Feature 2

blood pressure smart bracelet

Feature 3

Newest chip Nrf52832

Watch language support

Generic version , icon+ English abbreviation

APP language support

English,Russian,Spanish,Portuguese,Japanese,Chinese, French,


Nordic 52832

APP name

wearfit 2.0

bluetooth ID


Charging method

USB in-line charging



Type 1

bluetooth Sport HR Smart Band

Type 2

Fashion Sport Men Watch for iPhone

Type 3

Bluetooth Smart Bracelet for Sport

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