AP Products Electric Travel Trailer Lock. Self-contained electronic RV latch with Capacitive Touch Technology. Offers hassle free touch pad access: No key or fob to carry with you. An integral touch pad to the latch which controls the dead bolt. No wiring needed; uses 4 AA batteries (not included). It's retrofitable in most RV entry doors and it's easy to install. Programmable with a 4 digit PIN number. The large buttons are easy to see and use. Proximity sensing which illuminates the buttons. An intelligent keyless entry system which knows the position of the deadbolt and indicates low battery strength, as well as providing audible feedback to successful locking and unlocking functions. The key will always be able to operate the paddle or dead bolt lock in case of the user forgetting the code or having a dead battery. 8 inch x 5 inch x 4 inch.