15″ High Efficiency Woofer. Built-in BT Capability: Allow Your Speaker to Work with BT Enabled Devices. Rechargeable Battery. USB and Micro SD Inputs: Connect Your Non-BT External Audio Devices. FM Radio. Moonlight Glow Visual Effect. Mic Input (1 mic included). AC Power Supply: 100-240V. DC Compatible. Built-in Handle and Wheels. Remote Control Included. System Type: 15″ High Performance Speaker. Frequency Response: 30Hz-20KHz. Sensitivity (1w/1m): 65dB. Impedance: 4 ohm. Peak Power Capacity: 900 Watts. RMS Power: 25W. Program Power: 120W. Speaker Stand.