Supersonic IQ3008BT Port Speaker, 8-Inch Woofer, 600W 8" High efficiency mid-low woofer * Built-in BT compatible (wireless connectivity to other devices) allows your speaker to work with BT enabled devices * LCD Display Built-in Rechargeable battery (6 hours of battery life when full) * USB and SD inputs allows you to connect your non-BT external audio devices * FM radio * System type: 8" woofer, 30oz, 1" ksv performance speaker * Frequency response: 20Hz-20KHz * Sensitivity (1w/1m): 92dB * Impedance: 4ohm *