BYTECC OP-SW401 4 to 1 Optical Audio Switcher Specifications: Input Ports 4 x Optical Sample Frequency Up to 192 kHz Output Port 1 x Optical Audio Format PCM2, Dolby 5.1 & DTS 5.1 pass through Power Supply 5V / 1A DC Dimensions(mm) 154 (W) x 69 (D) x 23(H) Operating Temperature 0 Degree C~40 Degrees C / 32 Degrees F~104 Degrees F Storage Temperature -20 Degrees C~60 Degrees C / -4 Degrees F~140 Degrees F Power Consumption