15" High Efficiency Woofer. Built-in BT Compatible (wireless connectivity to other devices.) Allows Your Speaker to Work with BT Enabled Devices. Rechargeable Battery. USB and SD Inputs Allows You to Connect Your Non-BT External Audio Devices. FM Radio. 1 Mic Input (1 mic included). 1 Guitar Input. AC Power Supply: 100-240V. DC Compatible. Remote Control Included Specifications: System Type: 15" High Performance Speaker. Frequency Response: 30Hz-20KHz. Sensitivity (1w/1m): 65dB. Impedance: 4 ohm. Peak Power Capacity: 900 Watts. RMS Power: 30W. Program Power: 120W.