The Genius SP-925BT armed with the latest Bluetooth 4.0 capability is an ideal wireless companion for your smart mobile gadget -- be it your smartphone, tablet or laptop. The SP-925BT is built with two powerful speakers housed on two sides of the cube delivering a full range of 360° projected sound plus a passive radiator base driver subwoofer on the bottom pushing out exceptional bass effect. The speaker offers up to 8 hours of continuous music playback with 4 hours of battery charging. In addition, you won’t miss any important calls during music playback as it comes with a built-in microphone. The unmatched performance of this tiny speaker makes you want to have it when you first look at it but want to own it once you hear it.