[Battery Powered] The natural gas leakage detector uses 2 AAA batteries (excluding). The system warm-up time is about 30 seconds. When the battery voltage is lower than 2.4V, the low battery indicator will be on. No operation for 5 minutes or automatic shutdown for gas detection, saving energy. [Visual and Audio Gas Alarm] The gas detector adopts visual alarm and audio alarm, and the detection speed can be as fast as 0.5 seconds. When the bar graph increases and the detector beeps, you are reminded that gas has been detected. The alarm increases with the gas volume, and the LCD turns red when the gas concentration is high. [Detectable Gas] Quickly detect and locate known flammable gas leakage, such as liquefied petroleum gas, methane, ethane, propane, butane, natural gas, coal gas, gas fuel, sewer gas, liquefied natural gas, etc., accurately locate the leakage point, reduce the leakage risk, and protect the safety of family members and property. [Portable and Easy to Store] Compact gas detector with pen hook can be put in shirt pocket. Non slip texture is easy to hold. The natural gas detector is easy to store in the storage bag. [High and Low Sensitivity Mode] The gas leak detector has dual mode detection Low sensitivity: 500 to 1000 ppm; High sensitivity: 50 to 500 ppm. Accurate and reliable detection of gas leakage. Parts List: 1 x Gas Leak Detector 1 x Storage Bag 1 x User Manual Name: Gas Detector Sensor: gas sensitive semiconductor Warm up time: 30 seconds Response time 500ppm: 0.5-3 seconds;> 500ppm 0.5 - 2 seconds Detection range 50 to 1000 ppm (low sensitivity: 500 to 1000 ppm; high sensitivity: 50 to 500 ppm) Alarm vision: 7 x Bar chart; Sound: variable pitch frequency buzzer Power supply: 2 x 1.5V AAA alkaline (not included) Operating temperature: 0 - 50 C Relative humidity: 20 - 80% RH Dimensions: 16.5 x 2 x 2 cm Material: PVC Certification: CE, UKCA, RoHS, FCC Notes: 1.There may be slight differences between the picture and the actual color of the commodity. We will try our best to show you the exact color. 2.Please allow slight dimension difference due to manual measurement.