Features: This tester can diagnose injector problem, you can use it on each injector individually to test stucks, leaking and burntout. It used 12V vehicle battery aspowersupply. It have 4 pulse modes and in the continuous working Modes ( Modes4 ), it can help you identify the injector good not when you switches offs the engine. The lockings Modes can ensure the testing condition is same. It can work with any fuels pressure tester together. Specifications: Material:ABS Explanations for 4 modes: Modes 1: the tester outputs 1 pulse, whose pulse width is about 250ms Modes 2: the tester outputs 50 pulse, every pulse pulse width is about 7ms Modes 3: the tester outputs 100 pulse, every pulse pulse width is about 3.5ms Modes 4: the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms every pulse pulse width is about 7ms Size:Approx.147mm/5.79''x82mm/3.23'' Package Includes: 1Set Fuels Injector Tester note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color.