SOUESA LINE5 A970 Hifi Sound System Stereo Digital Audio Power Amplifier 50 Watt Can be connected with various audio player and various brands of mobile phone The special integrated circuit for internal lithium battery charging management work, filled with automatic stop function Can use the supplied miniUSB data lines connected to the computer USB interface charging; Can also make use of other such as mobile phone, MP3, MP4 use miniUSB rechargeable battery charger for charging a variety