AUTOOL AS503 2.8 inch Backlit Display Car Engine Oil Tester Lubricating Oil Quality Analyzer 1. Powerful Detection Range: Transmittance Detection measures oil transmittance (0-100%) using optical technology to visualize the level of oil contamination, helping users scientifically determine the oil change cycle. 2. Dual-Mode Adaptation: Supports both gasoline and diesel engine oil testing, compatible with mainstream vehicle models. Switchable Celsius and Fahrenheit units with real-time oil temperature display, ensuring engine temperature remains under 60°C during testing for safe operation. 3. Precision Testing with Sensitive Probe: Testing hose constructed from oil-resistant material resists chemical corrosion and extends service life. 800mm length allows deep access into dipstick tube or oil sump for accurate sampling. High-precision sensors ensure stable signal transmission and reliable light transmission rate measurement without interference. 4. Instant Readout with Clear Display: 2.8-inch high-resolution screen with backlight provides immediate results. Large LCD clearly shows light transmittance percentage, temperature, oil type, and status indicators such as warning symbols, enabling easy interpretation without technical expertise. Ideal for use in low-light or bright sunlight conditions. 5. Ergonomic Handheld Design: Features a silicone-coated grip for comfortable handling and lightweight construction for one-handed operation. 6. Operating Voltage: 6V 7. Operating Temperature Range: -10°C to 60°C