Volkano Supersonic Series Bluetooth Speaker Rubber Finished Get blown away by the explosive bass and scorching sound of the Supersonic Series Bluetooth Wireless speaker. Always get the clearest sound with the built-in equalizer and even take calls with the integrated microphone. Bluetooth version: 4.2 Battery: 1800 mAh,7.4V Product size: 400 157 195mm profiles: L2CAP/A2DP Output power: 4 INCH, 4?8W Driver Output Power: 7W*2 Sensitivity: 84dB/1W(1M) ±3dB at Hz S/N: 65dBA What's in the box 1 x Volkano Supersonic Speaker