MATERIAL : ABS + Silicone BLUETOOTH : BLE 5.2 WATERPROOF LEVEL : IP68 BATTERY CAPACITY : 230mAh WORKING TIME : 5-7day STANDBY TIME : 20-25days PHONE SYSTEM : Android 4.4 ; iOS 9.0 and above FEATURE 1 : Seamless Bluetooth Calling FEATURE 2 : Instant Notifications FEATURE 3 : IP68 Waterproof FEATURE 4 : 2.01 #34; Vivid Visual Display SCREEN : 2.01 TFT 240*296