Features: Precise values, high sensitivity, fast response. The instrument will automatically shut down after about 10 minutes . Anti falling, dust-proof, waterproof high quality material, comfortable to hold. Gas leak detector and hygrometer, in addition to measuring gases, you can also measure ambient humidity and temperature. Test various combustible gases to meet different requirements. Convenient for users to safely detect various combustible gases. Specifications: Material: Plastics, Electronic Component Gas Detection Range: 50-1000PPM Temperature Detection: -20 to 60℃(-4to140℉) (±1.5℃/3.0℉) Moisture Detection: 0.0%-99.9% (±6.0Rh) Response: 2-5s Warm Up: About 30 Seconds Support: Automatic Off, Undervoltage Indication, 3 Color Backlight, Beeper On Size: Approx. 142x58x28mm/5.59x2.28x1.10in Package Includes: 1x Tester 1x Manual 1x Certificate note: 3xAAA batteries are needed.(NOT Included) Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.