Smart Bracelet with Heart Rate Monitor

Keep 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


How to use it 

Step 1 : Please charge your new device for at least 10 minutes or more before the first usage, this ensures normal device boot and optimal operation. 

Step 2 : Power on ( long-press 5-7 sec this button to power on ) 

      Tips : long-press button you can Switch to power on /off page , back to home 

Step 3 : Download app ,Please search "Wearfit 2.0 " in your APP store and android market . and then download it ,and then Bind Bracelet ,(first time open APP ,click bind bracelet ) your device bluetooth ID name is “M4**”

Step 4: Open phone bluetooth ; search bluetooth in APP ,and connect bluetooth M4

Step 5: Once your bleutooth has been connected, the Data will be Sync , and watches time will Sync with your phone 

Step 6: Click mine ,to fill in your information 

Step 7: Click device management , setting call reminder / message reminder etc function 



FAQ for M4 Smart Watch 

Why does the pedometer not count steps when I have already started walking?

To reduce errors, smart watch usually sets an initial value of 10, it will count steps when we walk more than 10 steps. The APP will show the real walking steps and start counting from step 10.


What application is used when connecting to a smart phone?

The app is designed by the supplier. You can scan the QR code on the package or manual to download it when you get the item.


Why the device cannot boot or start up properly?

Please charge your new device for at least 10 minutes or more before the first usage, this ensures normal device boot and optimal operation. For devices with removable batteries, ensure they are properly installed before charging.


Standard Packing:


Charging cable*1