Power output (RMS) SW 12W R/L:4W+4W Signal to noise ratio : 80dB (A) Input sensitivity : AUX: 400±50mV : Bluetooth: 400±50mFFS : USB: 400±50mFFS Audio input : AUX, USB, Bluetooth Driver unit : L/R: 1 3/4inch, SW: 2 3/4inch Speaker dimension : 192.5x113x115mm