I have two of those driveway sensors and they work great. They alert my wife when someone drives into the home. But I don't think they will work on a boat.

Quote Originally Posted by Countrytime View Post
Danbo I think they are using cheap motion sensor alarms that will go off if the beam is broken. Look at Harbor Freight and type in alarms in the search box or check at Lowes or Home Depot on their websites.
http://www.harborfreight.com/wireles...tem-93068.html