Features: High sensitivity to detect combustible gas leakage. Quickly identify and determine the flammable gas leakage location. With a headphone jack for using in noisy environment. Sound and light alarm against flammable gas leakage. When combustible gas or vapor source is approached, frequency of audible signal (ticking) increases. Features: Color: White Sensitivity: 50 ppm Methane Heating up time: 60s Response time: 2 seconds Operation Cycle: Continual Operation Continuous Operation Time: 8 hours (slightly vary with operation status) Alarm limit: At least 10% methane Battery: 3 x LR14 1.5V Battery (Batteries NOT included) Size: Approx. 22 x 8.8 x 5.15cm / 8.66 x 3.46 x 2.03inch Weight: Approx. 657.6g Package Included: 1 x Combustible Gas Detector 1 x Storage Bag 1 x Manual 1、High sensitivity to detect combustible gas leakage 2、Quickly identify and determine the flammable gas leakage location 3、With a headphone jack for using in noisy environment 4、Sound and light alarm against flammable gas leakage 5、When combustible gas or vapor source is approached, frequency of audible signal (ticking) increases