Edifier Airpulse A100 Hi-Res Audio Active Speaker System with Wireless Subwoofer Bluetooth, Optical Coaxial, RCA - Ideal for HomeTheatre BLACK Hi-res audio certified Silk-dome tweeters 5\' mid woofer unit Built-in Amplifier w/ subwoofer output Optical, Coaxial, Bluetooth 4.1 aptX, RCA, AUX, and USB Inputs Specifications TWEETER UNIT Horn Loaded Ribbon Tweeter MID-WOOFER 5 inch Aluminum Cone Underhung Design Neo. Power Mid-Woofer AMPLIFIER SYSTEM Digtal Amplifer With Xmos Processor TOTAL POWER OUTPUT L/R(Treble)10W+10W, L/R(Woofer): 40W+40W FREQUENCY RANGE 52Hz-40KHz SIGNAL-TO-NOISE RATIO L/R:≥90dB(A) INPUT TYPE AUX, PC, USB, Optical, Bluetooth. INPUT SENSITIVITY AUX:450±50mV PC:550±50mV, USB:400±50mFFs, Optical:400±50mFFs, Bluetooth:500±50mFFs, Sub Out: 800mV(max) MAINS VOLTAGE 100-240 V AC/50-60 Hz