Hi-res audio certified Horn loaded ribbon tweeter 4.5 inch aluminum cone 30mm voice coil mid-woofer Digtal amplifer with Xmos processor / subwoofer output Input Mode: AUX, PC, USB, Optical, Bluetooth 5.0 with AptX INPUT SENSITIVITY: AUX:450±50mV PC:550±50mV, USB:400±50mFFs BLUETOOTH PROFILE: 500±50mFFs Optical : 400±50mFFs SUB OUT: 1200mV Max MAINS VOLTAGE: AC 100-240 V /50-60 Hz SIGNAL-TO-NOISE RATIO: L/R:?90dB(A) CABINET SIZE: 140x250x220mm NET WEIGHT: 9.3 Kg(20lbs) /pair