Genius(SP-906BT Plus) Bluetooth Portable Speaker- 3W - Blue Dimensions: 83 x 91.5 x 46.75 mm (3.27 x 3.60 x 1.84 inches) Unit: 40 mm Power output: 3 W Frequency response: 100 HZ - 20 KHz Sensitivity: 70dB Wireless operating distance: 10m Battery: Built-in rechargeable lithium battery - 780 mAh - Micro USB interface - 3.5 hours charging - 10 hours playing time based on 60% playback volume Color: Blue Weight: 185 g