DUOYI Automotive Electrical System Tester, 9-30V DC Digital LCD Car Circuit System Diagnostic Tool, Relay & Fuel Injector Tester with Multimeter Mode & Osciloscope Mode

Features: ‌Broad Electrical System Compatibility: Supports 9–30V DC electrical systems, making it suitable for a wide range of vehicles including automobiles, trucks, motorcycles, RVs, and boats. Integrated Multifunctional Diagnostics: Combines multimeter, oscilloscope, relay testing, fuel injector testing, component activation and testing, and an adjustable 0–5V power supply output to verify the writing condition of the tested component, making it an essential tool for automotive professionals and technicians. User-Focused Operation and Connectivity: Features a 2.4-inch TFT LCD that displays voltage, frequency, duty cycle, and waveform patterns for accurate real-time analysis. Ergonomic handheld design with five-button control, intuitive 9-grid UI, self-check function, audible buzzer, 14-language support, and online upgrade capability. Includes a 6-meter test lead, built-in LED front light, and practical test hook to facilitate convenient operation across diverse scenarios.