3 in 1 Out Optical Audio Switch Input Port: 3 x SPDIF TOSLINK IN, 1 x DC 5V Port Output Port: 1 x SPDIF TOSLINK OUT Audio format support: LPCM2.0 / DTS / Dolby Digital. Support output transmission distance up to 40m over fiber optic cable that losses less than 0.2 dB/m. Supports the last working state memory when switching off. Support manual switching or IR control. Support signal retiming. Overvoltage protection. LED operating status indication. No loss of sound quality. Easy to setup, installed in minutes. Dimensions: 6.2 x 5.8 x2.4 cm Weight: 65g. Note:Before using the remote control,please first take out the insulation plastic film from remote-control tail.If the remote is under long-time rest state,please insert the insulation plastic film Package Contents: 1 x 3x1 Toslink Switch 1 x 5V USB Power Cable 1 x Remote Control 1 x IR Extender Cable 1 x User Manual