AP Products 013-509 Electric Travel Trailer Lock Self-contained electronic RV door latch with Capacitive Touch Tech Technology that is a retrofit in RV entry doors The touch pad is integrated with the door handle and controls the deadbolt making it convenient to install and operate Completely programmable with a 4 digit PIN number. Low-profile inside egress prevents interference with screen door Keypad lights up for easy use at night and is powered by 4 AA batteries 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 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 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, Dimensions : 8.5 x 5.4 x 4.5 inches.