Toyota 4Runner Universal Blind Spot Monitor Safety Warning Sensor Detection Kit Universal rear video blind spot warning system that'll assist drivers.versal rear video blind spot warning Requirements: Drill, Screw driver, Clip Removal Tool, Electrical Tape, Zip Ties, Measuring Tape Optional tools: Rod to run wires, Soldering gun, Gloves, Goggles 2 x Sensor, 2 x Indicators, 1 x Sensor Harness, 1 x Indicator Harness, 1 x Speaker, 1 x Hole Saw