
One thing that worries me about towing my boat is that the guy behind me sees my brake lights when I stop and brake for leisure. . Unfortunately, some drivers do not give the semitrailer a safe space. Rapidly flashing brake lights attract driver's attention. Great security idea. I recently replaced the waterproof taillights on my boat trailer with sealed LED lights. This flashing device is designed for LED lights. I'm not sure if this will work with old incandescent bulbs. Connecting is easy. I simply connected this device between the 4-pin plug connections already installed on the truck and trailer and it worked immediately. Now if I continuously apply the brake, the trailer brake lights will flash rapidly and then stay on. The driver behind me told me it was impossible to ignore him. The $60 price tag is high enough, but when it protects your boat or trailer from a rear axle, it's cheap in comparison.

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