S2000MKIII Powered Bluetooth Bookshelf Speaker Bluetooth V5.0 with Qualcomm aptX HD decoding Continuous Undistorted Power Professional Wireless Remote Control 5 ½’’ Aluminium diaphragm drivers for ultimate bass response Patent-pending planar diaphragm tweeters that adapt to a wide range of acoustic conditions High efficiency Class-D digital power amplification Electronic crossovers and dynamic control based on dual advanced DSP chips Supports digital audio signal with sample rate up to 24BIT/192KHZ Listening presets: Monitor, Dynamic, Classical, and Vocal OLED LCD screen displays source/volume/sound effects modes for more convenient use PVC side panels with matte black finishPower output : L/R (treble): 15W+15W RMS L/R (mid-range bass): 50W + 50W RMS Signal to noise ratio :90dB(A) Noise level:25dB(A) Input sensitivity : Line 1 input/800±50mV Line 2 input: 600±50mV Bluetooth input: 450±50mFFs Optical/Coaxial input: 350±50mFFs Frequency response : 45Hz~40KHz