Active bookshelf speaker with Bluetooth pairing capability for music playback 5 inch bass driver with Aluminum diaphragm and 1 inch tweeter driver Optical and dual RCA inputs for connectivity to multiple audio sources Class D amplifier system with Digital Signal Processing (DSP) and Dynamic Range Control (DRC) Wireless remote control with audio source selection, mute and volume adjustment Rear side panel controls bass, treble and master volume Side panels with high gloss piano finish 100% MDF wooden enclosure to minimize acoustic resonance Universal 100V-240V power supply Total power output:24Wx2 + 36Wx2 (DRC On) Signal to noise ratio:?85dB Distortion:?0.5% Chanel Separation:?45dB Input sensitivity:LINE 1: 900±50 mVLINE 2: 700±50 mV Optical:950±50 mFFs Audio input:RCA, Optical, Bluetooth Speaker unit:Tweeter: 19mm silk dome tweeter, Bass: 4 inch (116mm) Dimension:Active speaker: 174x289x252 (mm) Passive speaker : 174x289x238 (mm) Weight:Net 10.5Kg