All optical audio switch can support DD/DTS 5.1CH audio formats, but only the very best can also support the latest DD+ / Dolby Digital Plus audio format. UTS3X1 is the latest premium quality three input to one output Toslink optical audio switch to support audio formats including 2CH PCM, DTS & Dolby Digital 5.1CH and DD+ / Dolby Digital Plus; other optical audio switches can't support the latest Dolby Digital Plus audio format. Get this for future-proofing application. | Compact size (25mm x 50mm x 60mm) durable aluminum metal jacket construction with IR remote control & input selection button on the switch | Comes with two 3ft premium quality Toslink cable capable of supporting Dolby Digital Plus / DD+ audio; an 80cm long micro USB power cable is included, USB power supplier is not included. | Please make sure to use a constant DC 5V USB power source to power this unit, do not use dynamic USB power chargers for cell phones / tablets. | Package Includes: UTS3X1 optical audio switch, IR remote control, two 3ft optical cable, one micro USB power cable, one year warranty

U9-EAMN model is the latest HDMI HDMI 2.0b 4K@60Hz, HDR , Dolby Vision, audio extractor to support the latest eARC TV for it to work with an HDMI audio receiver, the "To AVR" port goes to the regular HDMI input of the AV receiver; the HDMI "INPUT" port connects to the HDMI video source, such as a Blu-ray player; the "To ARC TV" port is to be connected to the ARC / eARC HDMI port of the TV if it supports ARC / eARC, or any HDMI input port of the TV if the TV doesn't support ARC. | For TV eARC application: Make sure the CEC and eARC functions of the TV is enabled, set the eARC switch to the "ON" position, and the EDID switch to "OUT2" position, power up the unit with the included USB power cable with a CONSTANT DC 5V USB power charger; do not use a cell phone / tablet USB charger which may have a dynamic output voltage. The eARC audio will be passed to the HDMI receiver when the eARC mode is on, and when eARC mode is on, the TV's own built-in speaker will not have sound. | To extract HDMI audio from the HDMI INPUT port, set the eARC switch to OFF position, set the EDID switch to OUT2 position, the HDMI audio from the connected "Blu-ray Player" will be extractor to the connected HDMI receiver. | To use the built-in speaker of the TV, set the eARC switch to OFF, set the EDID switch to OUT1. The HDMI output signal to the TV is always identical to the HDMI input signal, no modification, the HDMI signal to the AVR is audio only. | Package includes: U9-EAMN HDMI eARC Audio Extractor, micro USB power cable.