Specification: Bluetooth Version: Bluetooth 4.0 Watertight : Yes IP Rating: IP47 Screen Type: OLED Operating Mode: Touch Screen Compatible Operating System: Android, IOS, Android4.4 / iOS8.0 or later Battery Capacity: 150mAh Standby Time: 5 Days time: 2 days Charging time: approx. 1.5 hours Applications: Heart Rate Monitor, Alarm Clock, Call Reminder, Calories Burned, Camera Remote Control, Remote Recording, Incoming Calls, Messaging, App Notification, Pedometer, Planter Reminder, Sleep, Time Notification Type: Facebook, Twitter, Wechat Alert Type: Vibration Product Weight: 0.0180 kg Package Weight: 0.0460 kg Package Size (W x H x H): 14.00 x 8.50 x 3.00 cm / 5.51 x 3.35 x 1.18 in. Package Contents: 1 x Smart Bracelet, 1 x English User’s Guide, 1 x Charging Cable