Note: Only suitable for gasoline vehicles, not suitable for diesel vehicles. Features: This instrument can help you diagnose injector problems and can be used to test injectors one by one or two at the same time to help confirm sticking, leaking, damage or burnout conditions. Output power: 12V & 5V switchable, includes 2 pairs connector. It has 2 output voltage levels and 4 pulse signal output modes. Users can choose any one according to their needs. It uses the 12V battery on the vehicle or an external DC 12V (recommended at least 1.5A) power adapter as the power supply to work continuously. Input short-circuit protection function. Mode helps identify good and bad injectors with the engine off. This instrument can be used with any fuel pressure tester. Selectable activation modes: continuous, short medium and long switching outputs. The output wire is made of silica gel, which has better high and low temperature characteristics. Specifications: Item: Fuel Injector Tester Main Material: ABS Color: Black Power Supply Cable Length: 1m Power Supply: 12V Battery or DC 12V (Recommended 2A) Power Adapter Working Conditions: 0C-40C; Relative Humidity: 80% Storage Conditions: -20C-50C; Relative Humidity: 85% Size: 12*8*2.5cm Package Size: 17*13*6.5cm Package Weight: 300g Package List: 1 * Fuel Injector Tester 2 * Connector 1 * Storage Bag 1 * English User Manual Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.