... used for mobile phone,computer,MP3/MP4player 1.Input:5.0V Output:3.7V 2.battery :800ma Stereo ... /MP4player1.Input:5.0V Output:3.7V2.battery :800ma3.with radioOperation Manual:1. connect DC5V adaptor plug into the ... card,speaker automatically reads the memory plug in.4.Connect 3.5 stereo audio cabel to the socket of ... phone ,MP3,MP4 PC and toher audio devices.5.press the keys on the control panel ,you ...