AGPtek&reg; Digital Optical Audio True Matrix 4x2 Switcher/Splitter (4 In 2 Out) - Package Included: 1x Optical Audio True Matrix 4x2, 1x Remote Control, Universal 5V DC Power Adapter with US Plug 4 Inputs / 2 Outputs for Optical SPDIF / TOSLink Audio Management; A True Matrix for Any Input to Any Output. Audio format support: DTS-HD/Dolby-true HD/LPCM2.0/DTS/Dolby-AC3/DSD; Support signal retiming, need DC 5V/1A power supply, no loss of quality, installs in minutes. Used optical fiber cable loss less the 0.2Db/m, Output distance is up to 40m. LED status indication, it can tell us the working state of the device very easily. The input control can through R/M and also can directly press the button; Support last time working state memory when power off. Over-voltage protection can prevent the damage caused by connecting unmatched power adapter to the machine, if the light for standby indication flashed, it shows that the output voltage from the power adaptor is too high and the adaptor needs to be changed.