The best upgrade or replacement monitor available! Truly universal; works with all braking systems that depress the brake pedal Exceptional range and reliability. Line-of-sight transmission confirmed to 1,000 feet; proprietary send/repeat circuitry confirms each signal at 100 percent reception. Protects the towed vehicle's brakes and reports any braking activity to the motorhome monitor; includes a low-battery alert, extended braking and breakaway alarms, and five other audio and/or visual alarms and system status notifications 30-minute installation, all at the towed vehicle; simply plug the motorhome monitor into any 12-volt outlet. Automatic operation, activates only when the vehicles are connected for towing