【8 PRECISE PULSE MODES】From single 255 ms pulse to continuous 50-pulse cycles,diagnose stuck, leaking, or burnt injectors,4 Versatile Pulse Modes.Diagnose stuck, leaking, or burnt injectors with precision using 4 selectable modes (Single Pulse/50-Pulse/100-Pulse/Continuous Pulse). Test injectors individually without running the engine (Mode 4), saving time and reducing risk. 【UNIVERSAL COMPATIBILITY & SAFE OPERATION】 Works with any 12V vehicle (car, truck, SUV) and all fuel injector types. Features mode lock for consistent testing and clear LED pulse indicators. Follows strict safety protocols (requires engine off + battery connection) to prevent accidents.No-load output pulse voltage: AC 4V(except single pulse). Short pulse mode (Med) and continuous pulse mode (Cont) output pulse frequency: 35Hz. Long pulse mode (Long) Output pulse frequency: 70Hz. 【FAST DIAGNOSIS & EASY RESET】 Instantly identify faulty injectors to avoid costly replacements. Press PULSE to test; hold RESET for 2 secs to switch modes.12 V Battery Clips, draws power directly from vehicle battery in seconds, no wall adapter needed. Works with any fuel-pressure gauge for end-to-end injector flow & spray pattern diagnostics. 【RELIABLE & PROFESSIONAL-GRADE TOOL】 Powered directly by your vehicle battery. Built for durability (operates 0°C~40°C). Includes anti-short-circuit protection. Safeguards your engine from misdiagnosis.Clear LED Feedback,bright pulse-indicator instantly confirms injector actuation, saving hours of guesswork. 【COMPLETE KIT FOR MECHANICS & DIYERS】 Everything needed for injector testing: tester body, battery clips, and pulse cables. No extra tools required.Warning: Always wear eye protection and work in ventilated areas (per manual).With carrying bag for mobile mechanics & DIYers.Mode-Lock, reverse-polarity protection, and auto-stop safeguard engine and tester. The allsun EM276A Fuel Auto Injector Tester is a professional tool that is designed to test the performance of fuel auto injectors in diesel and gasoline engines. It is a versatile tool that can be used to test both individual fuel auto injectors and fuel auto injector banks. The tester features a digital display that provides clear and accurate readings, as well as a built-in speaker that emits a sound signal to indicate the presence of a fuel auto injector. The tester also has a variety of testing modes, including a test mode that can test the fuel auto injector's spray pattern, and a test mode that can test the fuel auto injector's resistance. The tester is easy to use, and comes with a variety of accessories that can be used to test different types of fuel auto injectors. The tester is also durable and reliable, and is backed by a one-year warranty.