Introduction This is a Multi-functional Bluetooth Sound Box with Hands-Free, Wirelessly stream music through this device from Smart phones, Android, Apple, Laptop etc, it will also let control your phone and handle your calls with the built-in hands free Function: Waterproof can be used in the bathroom Li-ion battery inside Bluetooth wireless, apply to mobile phone, MID, PC, etc Hand-free function Can be used in the car for Bluetooth Carkit Specifications: Size: ∮62xH59mm Loudspeaker: 40mm Rated power: 3W Interface: Micro USB Bluetooth parameter: Operation frequency: 2.400GHz~2.480GHz Power output(peak): class 2/4 dbm Receiving sensitivity: -91db,@ 0.1% BER Operation range: up to 10m Can be applied to all Bluetooth devices Battery parameter: Capacity: 400mA, 3.7V, polymer li-ion battery Music playback time: 5-7hrs at 70% volume Charging standard: DC 5V, 500mA Charging time: 1.5-2 hrs Package content: 1*waterproof Bluetooth mini speaker 1*USB cable 1*User manual 1*certificate of Conformity