Material: SiliconColor:Golden，Silver，GunScreen Size: 0.91?��Bluetooth:BT4.0Battery Capacity: 80 mAhStandby Time:32 hours OS Requirement: Android 4.3 OS， IOS 6.1 or abovePackage Included: 1 x Smart Bracelet，1 x USB CableFunction:Passometer，Fitness Tracker，Sleep Tracker，Message Reminder，Call Reminder，Remote Control，Anti-Lost