Generic AEFS763769072717 Portable Music Speaker, Superb Sound Stereo Speakers, Enhanced Bass, Acoustic Drivers, Bluetooth V3.0 System, Recharged by USB -Black 1.Portable stereo Bluetooth speaker is compliant with Bluetooth v3.1 wireless standard and NFC pairing function 2.Implemented with 2*4W total acoustic drivers and built-in super bass enhancer module which is distortion-free at maximum volume. 3.Built in speaker phone call-pick function and the wireless connection is up to 11m which you can hands free for your smartphones, tablets, laptops, PC, Pad, computer and all Bluetooth devices. 4.Plays all Audio devices through 3.5mm Aux in Jack.The playtime is 5 hours with a single charge,which is longer than other similar-sized portable speakers.It can be recharged by mini USB cable, which takes about 3.6 hours one time. 5.The simplicity Cube-look casing is a stylistic desktop design which can be portable as well which is perfect for home, dorm room, kitchen, bathroom, car, parties.