Optical 3x1 audio switch: with these digital optical SPDIF / Toslink audio switches, 3 optical Toslink sources can be easily connected to a SPDIF / Toslink signal receivers (home theater, speaker, amplifier, soundbar, AV receiver, etc.). Support last working status memory when power off. Supports 3 audio formats: this SPDIF Toslink switch supports uncompressed audio: LPCM 2.0, compressed audio: DTS, -AC3, no distortion of audio and video, no delay in signal mission, enjoy high quality audio quality and provide an excellent listening experience. Does not support 7.1CH Digital Plus / True HD. Long Distance & Lossless Signal mission: Built-in automatic balancing system ensures smooth and stable signal mission. mission distance up to 40 m via fibre optic cable with losses of less than 0.2 dB/m, sampling frequency up to 96 kHz. Surge protection can prevent damage caused by connecting an unsuitable power supply to the machine. Plug and Play: Easy to use, power this audio switch with a USB power cable via a phone adapter or a USB socket on the TV. Supports manual switching with IR remote control, comes with an external IR extender receiver. The input can be with the IR remote control or the button on the digital optical audio switch. You can easily switch the audio channels. Support for audio formats: LPCM2.0 / DTS / Digital. Supports a mission distance of up to 40 m via fibre optic cable. Supports the last memory when power off. Supports manual switching or IR control. Support signal retiming Surge protection LED power status indicator. No loss of sound quality. Easy to set. Different batches and screen printing differences do not affect usage Colour:Black Material:Aluminum Alloy Package Contents: 1x switcher 1x USB cable 1x optical fiber cable 1x remote control Only the above package content, other products are not included.