4Pin 2 in 1 Cable w/ Switch Button 2CH for Vehicle Camera Car Rear View Monitor | eBay
1-Wire (One Wire) and iButtons - buy iButtons online at iButtonshop.com
1-Wire electronic key reader, great for access | Loxone Shop
Teltonika: iButton key, magnetic, with holder | MIRIFICA Store
Magnetic 1-Wire iButton w/ Blue Plastic Holder | iBUTTON.CC
DS1982-F5 1Kb Add-Only iButton
mxuteuk 19mm Latching Push Button Switch 1 NO 1 NC SPDT ON/OFF Black Metal Shell with 12v Green Power Symbol Light With Wire Socket Plug Suitable for 3/4" Mounting Hole Self-Locking L-19-POWER-B-G :
mxuteuk 19mm Latching Push Button Switch 1 NO 1 NC SPDT ON/OFF Silver Stainless Steel Shell with 12v Blue Power Symbol Light With Wire Socket Plug Suitable for 3/4" Mounting Hole L-19-POWER-T-BU :