12" High Efficiency Woofer. Built-In BT Receiver: Wirelessly Connect to your iPad, iPhone, iPod, Smartphone & More. USB/microSD & AUX Inputs: Connect Your Non-BT External Audio Devices. FM Radio. Rechargeable Lithium Battery. Volume/Mic Volume/Echo Gain Controls. 1 Mic Input (1 mic included). AC Power Supply: 110-240V. Remote Control Included. Retractable Handle and Wheels for Easy Transport. System Type: 12" Woofer. Frequency Response: 30Hz-20KHz. Sensitivity (1w/1m): 90+/-2dB. Impedance: 4 ohm. Peak Power Capacity: 250Watts. Program Power: 25W.