H8 Bluetooth 4.0 Smart Bracelet Sleep Monitor Sports Tracker Call Message Reminder Remote Camera Music - White OS Compatibility: Android 4.3 / iOS 7.0 and above system Bluetooth: Bluetooth 4.0 Battery Life: 3.7V / 60mAh Battery Type: Polymer battery Standby Time: About 8 - 10 days Depth: 22.0 x 1.5 x 1.0 cm Weight: 21 g Package Content: 1 x H8 Smart Bracelet, 1 x USB Charging Cable, 1 x Chinese/English Manual