The Super Tooth DISCO TWIN are a pair of portable, rechargeable speakers featuring true right / left stereo, each unit equipped with 16 watts RMS audio power, double speakers in front and a high efficiency bass reflex system in back, pairing together for a combined 32 watts of pure sound. Music can be streamed wirelessly from any Bluetooth-enabled device to the DISCO TWIN; users simply pair their Bluetooth device to both speakers, and Bluetooth stereo technology will channel audio to each. The integrated rechargeable batteries ensure 3-4 hours of non-stop, maximum-volume music or up to 10 hours of moderately played tunes.- Charging time: 2 hours- Stand-by time: 1,500 hours- Music play time: 3 to 4 hours (High Volume)- Music play time: 10 hours (Med Volume)- Battery type: NiMH rechargeable battery- Bluetooth version 3.0- Compatible with all A2DP Devices- Frequency: 2.4 GHz- Internal Power Amplifier: 2 x 16 Watts RMS.