These are cable entry/exit faceplate with a black/White brush to keep the plate tidy where the cables exit the wall or trunking. standard AV cables then connect to the stub cables - so no soldering or wiring is needed.
eBay
Displayport HDMI KVM Switch dual monitor 4X2 2X2 HDMI Displayport USB KVM Switch Dual Display DP HDMI USB Switch KVM Switcher
Aliexpress UK
eBay
HDMI 2.0 Switch 7 in 1 out 4K 60Hz HDMI Switch 5X1/4X1 HDR HDMI 2.0 Switcher remote for PS5 Xbox Series X NS Switch PC 4K HDTV
Aliexpress UK
BluStream 4x2 4K HDMI Matrix MX42AB. Plastic cover missing over IR Blaster.
eBay
HDMI Matrix 4K 60Hz HDMI 2.0 Matrix Switch splitter HDMI 6X2 Matrix HDMI 4X2 Matrix HDMI 2X2 Matrix HDMI 2X4 Matrix with audio
Aliexpress UK
It also allows you to output a single high-definition source to two displays. 4K HDMI 2.0 Bi-Direction Switch. • Supports 4k x 2k, 3D, 1080P resolution. • Supports HDCP pass-through. [LATEST HDMI SPECIFICATIONS] 4K@60Hz, 1080p@60Hz, 3D, Deep Color, HDCP pass-through, uncompressed and compressed audio formats are all supported.
eBay
4 Port HDMI KVM Switch 4 in 1 out 4K 60Hz HDMI USB Switch Selector with Desktop Controller for 4 PC Share Monitor Mouse Keyboard
Aliexpress UK
DESCRIPTION HDMI SPLITTER 3 IN 1 OUT : 3 HDMI ports in and 1 HDMI out for various HDMI devices. You can easily switch your video and audio from 3 HDMI devices to one HDMI player's Screen via pressing the switch button. And this HDMI Switch is equipped with a 50CM HDMI Output cable for you to connect with any standard HDMI player. 4K RESOLUTION SUPPORTED : Support 4K x 2K 30hz, 1920x1080 60hz, and 3D, while the 4K 60Hz is not compatible. With this 3 In 1 HDMI switch, you can enjoy the most luxurious video and audio. ( Please use standard HDMI 2.0 cables or above to connect your 4K HDMI Device, and pay attention to distinguish the applicable device types.) PLUG and PLAY : HDMI splitter 4k is so easy to setup and operate, no external driver needed. Just connect your HDMI devices and sim.
eBay
HDMI 2.1 Switch Splitter 120Hz 5-port HDMI 4K 120Hz Splitter Switcher CEC 48gbps HDMI 2.1 Switch 8K with remote HDMI HDR 8K 4K
Aliexpress UK
eBay
HDMI KVM Switch 4K 60Hz 4-port USB KVM HDMI Switch selector Box USB 2.0 and HDMI 2.0 Switch KVM HDR for mouse,keyboad,monitor
Aliexpress UK
DTV / HDTV: 480i / 576i / 480P / 576P / 720P / 1080i / 1080P / 4K x 2K. Progressive scanning (50Hz & 60Hz): 480P, 576P, 720P, 1080P, 4K 2K. Maintain high resolution (max 2160p), 4K 2K. 1 X HDMI Switcher.
eBay
2x4 HDMI Matrix Switch 4K 60Hz HDMI Matrix 2 in 4 out Matrix HDMI Switch Splitter Audio Extractor For Dolby PC to TV Monitor
Aliexpress UK
Digital HDMI/DVI video selector/AB switch no lead enhanced vision. Condition is New. Dispatched with Royal Mail 2nd Class.
eBay
60Hz 4K HDMI Switch HDR HDMI ARC audio extractor HDMI 2.0 splitter switcher HDMI Switch audio extractor for PS4 pro apple TV
Aliexpress UK