Fangrui Product Details 1. Habotest Portable Rechargeable Gas Detector 2. Combustible Gas Detection: 0~lel (0-9999ppm) 3. Alarm Mode: Sound And Light Alarm 4. Signal Strength Display: 20-level Analog Bar + Numerical Percentage 5. Signal Strength Indication Mode: Sound From Slow To Fast; Screen From Green To Red 6. Automatic Shutdown: No Operation, No Sensing Signal, Automatic Shutdown In About 5 Minutes 7. Power Supply: 3.7v 800mah Lithium Battery 8. Can Detect Acetone, Acetylene, Alcohol, Ammonia, Benzene, Butane, Ethanol, Ethylene Oxide, Gasoline, Hexane, Hydrogen, Methane, Naphtha, Natural Gas, Paint Thinner, Propane, Solvents And Other Gases 9. Built-in Telescopic Extension Rod For Detection In Confined Spaces 10. 3-color Backlight Display, Clearly Visible At Night 11. High Sensitivity Or Low Sensitivity Mode Can Be Selected As Needed 12. Type-c Charging Interface, Built-in Large-capacity Lithium Battery, Long-lasting Detection 13. Built-in Flashlight For Easy Use In Dark Environments 14. Display Screen Indicates Low Battery Voltage, Charge In Time 15. Automatic Shutdown, Automatically Shuts Off After About 5 Minutes, No Measurement Signal Or Key Operation, To Save Power 16. Anti-slip Design On Both Sides Of The Instrument, Comfortable Grip 17. Weight: 134g 18. Dimensions: 123x55.5x27mm