L38i Heart-rate Smart BT Sport Wristband Calls Notification Activity Tracking Sleep Monitor for iPhone 7 Plus Samsung S8+ iOS7 Android4.3

Features:
Lightweight and compact, sweat-proof, comfortable wear for a along while
Heart-rate/activity tracking/sleep monitor, timely record sport activity or sleeping data, to lead a smart healthy life
Calls notification/message: text other messages push
For iPhone 7 plus Samsung s8+. BT 4.0, APP for android 4.3, iOS7 or above
Specialized magnetic charging pad, longtime endurance

How to use it
Read user manual carefully
Download, install APP
Register, match them
APP for android 4.3, iOS7 or above