Brake light blinker, four flashes then solid. Safety Flash Light Alert. Universal BRAKE LIGHT BLINKER - Multi mode brake flasher device. Avoid rear end collisions. MULTIPLE MODES - Four flashes then solid. Fast or slow rates. Fits behind any brake light. EASY TO INSTALL - Connects to existing third brake light. 5 min install. 3 wires to connect. SAFETY FIRST - Install one today and prevent rear end collision tomorrow. Waterproof. MADE IN USA - Made in the United States.