Remote Control : R273DB gives you the option to control your music from the wireless remote or the side panel. Adjust the bass and treble to your liking for perfect sound. 3.5mm to RCA, Bluetooth, Optical/Coaxial Total power output: RMS 14Wx2 (treble) + 14Wx2 (mid-range) + 40Wx2(bass) (DRC ON) THD + N: 10% SNR: >85 dBA Frequency Response: 45Hz-20KHz(@+/-6db) Input sensitivity: Line in 1: 700 mV ± 50 mVLine in 2: 500 mV ± 50 mV OPT/COX: 350mFFs ± 50mFFs Bass Unit:6½ inch (178mm) Mid-Range Unit: 4 inch (116mm) Treble Unit Φ19 mm silk dome tweeter