New Tachometer Sensor Speed RPM Signal Adapter Speed Signal Collector for Gasoline- Engine

How does it work?It senses magnet signal change when vehicle original alternator is running, then then output 9v pulse for all types of Tachometer\/RPM GaugeEasy Installation, no breaking cable, no need CANBUS\/OBDOutput TACH ratio: 4 pulses\/roundIP67 WaterproofMini Size with Play & Plug design supply: 9-36V DCStyle:Suitable for gasoline enginesMaterial:ABS plasticcolour:BlackPackage Contents:1 * speed sensorOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.