Listen to music wirelessly Foldable Volume control Built-in bluetooth 2.1 With upto 33 foot range Plays song with micro SD Card (upto 32 GB) - not included Upto 3.5 hours talk time Upto 3 hours music time Upto 240 hours music time Built-in rechargable battery Charge time: 2 Hours Frequency Response: 20Hz - 20kHz Sensitivity: at 1KHz: 110 /-5dB Plug type: Stereo 3.5mm jack(Audio cable not included) Supports virtually every Bluetooth device(including all cell phones computer and tablets)