YCC Team Fashion Ky-g10 Aluminum Bluetooth Stereo Dual Speaker (Gold) Flawless high strength aluminum enclosure with high quality faux leather handle and spun aluminum brackets and buttons. Bluetooth range has been independently tested to 30 metres (open space, without any block) New upgraded Bluetooth CSR4.0 version (vs CSR2.0) with even better sounding specifications True 3W+3W output for high quality stereo sound with noise reduction for answering phone calls from your smart phone. Rechargeable 2200mAh lithium-ion battery can play up to 8 hr of music playback and quickly recharges in 3hrs.