1、Good Performance: This handheld combustible gas detector has sensitive performance, with low power consumption and long service life. 2、Dual Alarms: This gas leak detector has dual alarms, when a combustible gas leak is detected, the machine will emit a beeping sound and alarm and the display will have a red alert. 3、Excellent ABS Material: This natural gas detector is made of excellent ABS material, which is scratch resistant and impact resistant, not easy to be warped and has good durability for long time working. 4、Easy To Operate: This portable gas tester is easy to operate, you just need to press the power button to turn on the device, wait for 30 seconds to warm up before using it, and long press the power button to turn off the device. 5、Compact And Portable: This handheld gas analyzer is small in size and light in weight, which makes it very convenient to carry around and use. Item Type: Combustible Gas Detector Model: HT609PRO Material: ABS Battery: 1.5V AAA Battery x 3 ( Shipped Without Battery ) Temperature Range: -20℃-60℃(-4℉-140℉) Humidity Range: 0.0%-99.9%PH Sensor: Gas Sensitive Semiconductor Detection Range: 50-1000PPM Response Sensitivity: >50PPM Warm Up Time: Approx. 30 Seconds Response Time: ≤500PPM: Approx. 5 Seconds >500PPM: Approx. 2 Seconds Alarm Mode: Buzzer and Indicator Lamp 1 x Combustible Gas Detector 1 x Storage Bag 1 x Manual