Features: This instrument can help diagnose injector problems and can be used to test injectors one by one or two at the same time to confirm sticking, leakage, damage or burnout. Output power: 12V 5V switching, includes 2 pairs connector. It has 2 output voltage levels and 4 pulse signal output modes. Users can choose any according to their needs. It uses the vehicle's 12V battery or an external 12V power supply (at least 1.5A recommended) as the power supply for continuous operation. Input short circuit protection function. The mode helps identify good and bad injectors with the engine turned 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 properties. Specifications: Item: Fuel Injector Tester Main material: ABS Color: black Length of power cable: 1m Power supply: 12V battery or DC 12V (2A recommended) power supply Working condition: 0 deg; c-40 deg; c; Relative humidity: le; 80%Storage conditions: -20 deg; c-50 deg; c; Relative humidity: le; 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