Kinivo BTX450 Premium Bluetooth Boombox with Powerful 10W dual drivers and passive subwoofer Enjoy powerful 10W (2 x 5W acoustically balanced drivers) of premium full bodied rich sound and dynamic bass (passive subwoofer) as compared to smaller desk speakers which only have 6W (2 x 3W) drivers Take your music with you all day through built in 3600 mAh rechargeable battery, which can be used to play upto 6 hours of continuous music Seamlessly stream music from any Bluetooth (A2DP) capable device or non-Bluetooth device using 3.5mm port Recharge your device while listening to music via built in USB port (this feature works only while the speaker is plugged into AC power) Easy to Pair functionality with easy access control buttons at the top