BSIDE X4A Portable Combustible Gas Detector Gas Leakage Alarm 1. Compact and convenient, can work at any time 2. Can detect multiple combustible gases to eliminate potential safety hazards 3. 3-color indicator design. Simple and easy to understand 4. Can carry out air wet temperature test, high precision sensing 5. Digital display design, replaceable battery, longer service life Parameters: 1. Detecting gas: hydrogen, carbon monoxide, methane, ethane, propane, butane, ethylene, propylene, butylene, acetylene, propyne, butyne, hydrogen sulfide, phosphine 2. Detection range: 300-10000ppm (reference medium for methane) 3. Sensitivity: 50ppm 4. Response time: 2 seconds 5. Warm-up time: 30 seconds 6. Alarm mode: analog strip, LED lights, beeps 7. Range: humidity measurement: 0-100% RH; temperature measurement: -10-60 degrees celsius 14-140 degrees fahrenheit 8. Resolution: humidity measurement: 1 percent RH; temperature measurement: 0.1 degrees celsius 0.2 degrees fahrenheit 9. Accuracy: humidity measurement: about 5 percent RH; temperature measurement: about 0.1 degrees celsius 0.2 degrees fahrenheit 10. Automatic shutdown: about 5 minutes 11. Power supply: 2 x 1.5V AAA batteries (not included in shipment) 12. Size: 170 x 28 x 31mm 13. Weight: 67g Packing list: - Main unit x 1 - Storage bag x 1 - Instruction manual x 1