For vintage and classic cars that want more visibility when you are driving your antique car. This flasher operates from -24V to +12V. This brake strobe works great for 6 Volt positive ground vehicles. Great for cars, trucks, motorcycles and scooters. You can connect this to your brake light to help with flashing brake lights when you press on the brake. The flashing will stop and the brake light will become solid. This flasher also works for vehicles that are 6 volt negative ground. There are 4 wires to hook up, input ground, input on, output ground and output flasher. Can operate up to 150 watts of incandescent or led bulbs.