Package Included:
1* M4 smart bracelet
1* Charging cable
1* Instruction manual
Main Features:
Device model: M4
Bluetooth: 4.0
Battery: 90mA Polymer Lithium-ion
Waterproof: Life Waterproof
Compatible system: for IOS8.0 and above, for Android4.4 and above
Synchronization Range: 3m(theoretical rang is 10m without any interference)
Main functions: heart rate monitoring, step counting, calorie burning, distance, RTC display, automatic sleep monitoring, call reminder, information push, alarm reminder, anti-lost, remote control, etc.
Waterproof and dust proof: sweat proof, rainproof, splash proof
Connection: Bluetooth Low-power Bluetooth 4.0 synchronization
Data Storage: Record 7 days of detailed exercise data
Battery type: polymer lithium battery
Charging method: USB charging cable
DISCLAIMER: DATA FROM THIS DEVICE IS TO BE USED AS A GUIDELINE AND REFERENCE ONLY. THIS DEVICE IS NOT A SUBSTITUTE FOR MEDICAL ADVICE!
after the package was lost the seller agreed to resend the package
delivery was good!
I recommend this seller!