1. Gas leak detector andtemperature and humidity meter. In addition to measuring gases, you can also measure ambient humidity and temperature. 2. Accurate numerical, High and low sensitivity, quick response 3. Test a of combustible gases to meet different needs.It is convenient for users to safely detect all kinds of combustible gases. 4. Auto power off After about 10 minutes, the instrument will automatically shut down. 5. Fall proof, dust proof and water proof ABS material, comfortable to hold. Combustible gas detection: 50-1000PPM Temperature detection: -20-60C(-4F-140F) Humidity detection: 0.0percent -99.9percent RH Display: LCD Auto Power Off: Yes Low battery indication: Yes Trichromatic backlight: Yes Buzzer alert: Yes Power: 3pcs x 1.5V AAA battery (Batteries Not Included) Material: ABS colour: Package Contents: 1 x Gas Detector(without battery) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.