Suggestions for electronic devices

If you have any suggestions for electronic devices list them here.
Currently planned devices are:
-Cameras
-Computers (Done)
-Power Generators(Done)
-Wires(Done)
-Sentry Guns
-Automated Locks(Windows and doors)
-Wired and Wireless Routers (For linking devices to computers for configuration and control)
-Microphones
-Numeric Keypads(windows and doors)
-Radios (Mounted and handheld)
-Phones(Mounted and handheld)

Hand-held Radios! Phones are great, but sometimes you want to broadcast to a group of people you may not know first hand. (Survivors hiding out in a building, ect ect)

Good ones, added to the list!