got three of the ar500 rx. one lasted two weeks..and dead. wouldn't bind or even lite up. didn't damage anything, it happened on the groung. sent it back to horizon three weeks ago. no response,so i called them. there sending me a new one, whenever they get them in. for a few dollars more i would buy a 6100 or 6200 they don't seem to cause as much trouble . .........................GEETER