HDMI to Micro HDMI cables
These 3 below have been tested and work with the Pi4's and pass through CEC.
Keyboard & Mouse all in one HERE
Powerline Adapter HERE
Ethernet Switch HERE
USB Extenders HERE
Velcro Strap HERE
Zip Ties HERE
Type C Ethernet adapter HERE (If your phone or tablet has the type c charging port this is the adapter you'll need)
Apple Lightning Ethernet Adapter HERE
Micro USB Ethernet adapter HERE
Other items you will want to always have in your go bag include.
Remote control for your TV's
Extra batteries for your mouse and keyboard and remote control
50ft ethernet cable HERE
Extra PI Player if possible