Gas Leak Detector High Sensitivity Gas Detector with Audible & Visual Alarm

Range 50 to 1,000 ppm, Battery Included, Track Gas Leak from Gas Hob, Oven, Propane Tank for Home/Flat/RV   Warm-up Time 30-45 seconds Dimensions 7.1" x 1.26" x 1.26" (180 x 32 x 32 mm) Alarm Mode Audible and Visual Alarms Audible Alert 75 db Ticking, Modulation Proportional to Gas Concentration Visual Alert 6 × Bars. The bar graph is proportional to the gas concentration, and the screen background changes from green to red Range 50 to 1,000 ppm Response Time ≤ 500ppm: 0.5~ 3s; >500ppm 0.5 Just 3 Steps, Easy To Use a Gas Leakage Tester, Quick Locate Gas Leak Step 1. Install 2 AAA batteries (included in the box) into the battery compartment according to the positive and negative marks. Step 2. Turn on the natural gas detector, it will take 30-45s warm-up time to calibrate. Step 3. The gas leak detector enters high sensitivity mode after calibration. Aim the sensor of the gas detector at the area to be measured. When the detector detects