Features100% brand new and high quality.This injector tester can be used to help identify stuck, leaked or burned out conditions,it uses 12V vehicle battery for power.Large LED display/4 Pulse Modes. Test Lead: 41.5cm / 16.3 inches.It can work with any fuel pressure tester, easily to clean most car motorcycle fuel injectors.It will help us clean and test the injectors of gasoline cars and motorcycles.The engine of the car must be turned off before using this instrument.Specifications:Power Supply: 12V vehicle batteryOperation Environment: 0-40C,relative humidity 80%Storage Environment: -20C ~50C, relative humidity85%Size: As the picture showExplanations for 4 modes:Mode 1: the tester outputs 1 pulse, whose pulse width is about 255msMode 2: the tester outputs 50 pulse, every pulses pulse width is about 7msMode 3: the tester outputs 100 pulse, every pulses pulse width is about 3.5msMode 4: the tester outputs pulse continuously at the rate of 50 pulses per about 1450ms, every pulses pulse width is about 7msPackage Included:1 x Fuel Injector Tester1x Manual