Delivers Durability, Flexibility, and Outstanding Audio Performance with Exceptional Range. The Speaker System is Perfect for Home Entertainment, Seminars, or Any Other Venues and Events 15 High Efficiency Woofer. Built-in Bluetooth Compatible Allows Your Speaker to Work with Bluetooth Enabled Devices. True Wireless Stereo (TWS): Allows You to Connect 2 Speakers Via Bluetooth with TWS Technology So they Can Play at the Same Time and You Can Double Your Audio Output. Rechargeable Battery (12.8V/5.5A/5500mah), USB, Micro SD & AUX Inputs Allows You to Connect Your Non-Bluetooth External Audio Devices FM Radio. 1 Mic Input (1 wireless mic included) AC Power Supply: 100-240V DC Input Compatible, Built-in Handle, Remote Control, 1 Wireless Microphone Included. System Type: 15 High Performance Speaker Frequency Response: 50Hz-20KHz, Sensitivity (1w/1m): 75 3dB, Impedance: 3, Distortion: ? 1% 1KHz 1W, Peak Power Capacity: 600 Watts, RMS Power: 2 x 20W.