https://youtube.com/watch?v=l0-TYwD5iCcRV Lock was kind enough to send us their V4.0 Keyless Entry Handle to try out and make this product...
RV LOCK
https://youtube.com/watch?v=0KnKRdLJiPMReese Towpower Coupler Lock for Travel Trailers This is a generic trailer lock that provides security for an economical price....