Ottonavi Universal Rear Blind Spot Sensor Monitor Interior Detection Warning System Indicator Assist Safety Universal rear video blind spot warning system that'll assist drivers. 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 Easy Installation. Video installation available upon request