This device can help you diagnose problems with car injectors and can be used for injectors by to help confirm if they were stuck, leaking, or burned. It has 4 pulse signal output modes: single pulse, short pulse, pulse and continuous pulse. Users can choose any of them according to demand. Use the vehicle's 12V car battery as power source. Continuous pulse mode helps identify good or bad injectors when the engine is off., Manufacturer: Bumdenuu