2 x 6.5 in. high-efficiency woofers Built-in Bluetooth(R) allows speaker to work with Bluetooth(R) enabled devices True Wireless Stereo (TWS) allows user to connect 2 speakers via Bleutooth(R) to double audio output 3.7-volt/1,800 mAh rechargeable battery USB/micro SD(TM) and auxiliary inputs to connect non-Blutooth(R) external devices FM radio Flashing light on woofer Microphone input 100-volt to 240-volt AC power supply Built-in handles 90 Hz to 20 KHz frequency response 90 +/- 2dB sensitivity 3 ohm impedance 1,000 watt peak power capacity 15 watt RMS power Includes remote, microphone, and user manual Red