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Main function: Heart rate monitor, Call notification, Message reminder. Pedometer, Calories, Distance, Time display, Sleep monitor, Shake photograph, Anti-lost reminder, Smart alarm clock, Smart unlock, Sports information sharing.Activity Tracking Function: Heart Rate Sensor, Sports Pedometer, Motion Odometer, Sleep Monitor, Sedentary ReminderSport..

Brand: M4Model: M4 Chinese VersionBluetooth Version: BT 5.0Compatible OS: Android 4.4 or above , iOS 9.0 or aboveAPP Name: Wearfit M4 Fitness Band Special Features:....Waterproof: 5ATMMobile PaymentHeart Rate MonitorBlood Pressure MonitorBlood Oxygen MonitorSleep MonitorMulti-sport ModesSupport (Swimming,Outdoor Run etc)Call or Message ReminderReje..

SKMEI Smart Watch Features:...Water Resistance Depth: 5BarCase Shape:RectangleSleep Tracker,Message Reminder,Stop Watch,Fitness Tracker,Back Light, Chronograph,Call Reminder,Bluetooth,Auto Date,Week Display,Alarm,Heart Rate..