Controllable Four Outlet Power Relay Module version 2 [(Power Switch Tail Alternative)] : ID 2935 : $39.95 : Adafruit Industries, Unique & fun DIY electronics and kits
2 Port KVM Switch hdmi Switcher With Cable for Dual Monitor Keyboard Mouse HDMI switch Support desktop controller switching - AliExpress
4K HDMI 2.0 Wallplate Transmitter Switcher with 2 x HDMI and 1 x USB-C Input with RS-232 Control, Display On-Off Button - woxcon