This 4 x 2 digital optical SPDIF / Toslink audio matrix allows you to share 4 different audio inputs between 2 independent amplifiers or speakers. Featuring a front panel button and remote control, the matrix switch enables individual switching of every two inputs, allowing for the display of two different input sources on various output equipment, or a single source to be output to two, offering maximum flexibility. FEATURES The machine shares 4 distinct audio inputs between 2 independent output devices •Audio format support: LPCM2.0 / DTS / Dolby-AC3 •Support signal retiming •The output transmission distance is up to 40m when using optical fiber cable with losses less than 0.2 dB/m •Switched via remote control or front button •Supports last working state memory when turned off •Overvoltage protection prevents damage to connected devices if the standby indicator light flashes, it indicates that the output voltage from the power adapter is too high and the power adapter needs to be replaced •The matrix features an LCD display for easy status monitoring •No quality loss •Installs in minutes