The JTECH-8K42A is a high-performance 4×2 HDMI 2.1 Matrix with audio extraction feature. It supports up to 8K@60Hz or 4K@120Hz resolution so you can view your content as it was intended! The JTECH-8K42A also supports ARC via Optical, and audio extraction via Optical and RCA, making it easier for you to send audio to any external sound system. With multiple ways to control the units such as the front panel buttons, or the included IR remote, the JTECH-8K42A is the perfect audio/video distribution companion for any office or home theater/media room. Plug & play without the need for any additional setup.