Edifier R2750DB Active 2.0 Bluetooth Speakers with Remote - Black - Total Output Power: RMS 14W x 2 (HF) + 14W x 2 (MF) + 40W x 2 (LF) (DRC on) - Signal-to-Noise Ratio: 0=85 dBA - Frequency Range: 45 Hz ~ 20 kHz (¡À 6 dB) Input - Sensitivity: line input 1: 700 mV ¡À 50 mV; line input 2: 500 mV ¡À 50 mV - OPT/COAX: 350mFFs ¡À 50mFFs - Inputs: RCA/Optical/Coaxial/Bluetooth - Woofer: 6? inches (178 mm) - Midrange Speaker: 4 inches (116 mm) - Tweeter: ? inch - R2750DB-BLACK - 12 Months Limited Warranty