Usb 20 interface usb audio device class spec 10 usb hid class spec11 compliant support 48441 khz sampling rate for both playback and recording 1 x 35 mm jack for headphone connection 4 x 35 mm jack for multi channel speaker set connection 1 x 35 mm jack for line in connection 2 x 35 mm jack for microphone connection 1 x spdif toslink optical digital input 1 x spdif toslink optical digital output get top quality sound on your computer the sandberg usb sound box 71 allows you to connect spe