1. Sensor signal that simulates voltage changes. The ratio of the two voltage signals V1 and V2 is adjustable.Air flow sensore; Intake air pressure sensor; Oil pressure sensore; Boost pressure sensor; Common rail pressure sensor; Oxygen Sensor; Accelerator pedal sensor(2: 1) etc. 2. Sensor signal that simuletes resistance change.Coolant temperature sensor; Intake air temperature sensor; Oil temperature sensor; Exhaust gas temperature sensor; Fuel temperature sensor; Ambient temperature sensor'Evaporator temperature sensor, etc 3. Can be used as a voltmeter, measureing range 3-30V 4. Outpt 5V voltage Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance. Material: plastic colour: Black Package Contents: 1 x Auto Sensor Simulator Only 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.