... searching MP3 by auto when insert equipment; Support audio input, stereo surround; Support DC 5V (USB) charging, support (5V/1A) charger, ... Phone, MP3, PM4, PC, Laptop and other sound sources. Remote controller can select; Vibration speaker Specification 1, Power Input 23W(RMS2, Frequency ... Respond 30Hz-20Hz3,Speaker Unit 40mm4Ω2W×24, Rated Voltag 3.7V/85mA5,Signal ...