... capacity battery, Support FM: 87.5MHZ-108MHZ Built-in battery, LINE IN interface can connect 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 ...