Features: Long flexible stainless steel probe helps you reach more area. Sound and light alarm against combustible gas leakage. With gas leakage degree indication and low battery indication. Adjustable sensitivity, adapts different detection requirements. Compact size, light weight, easy to carry and operate. Specification: Brand: SMART SENSOR Model: AS8800L Sensor: Semiconductor Detection gas: Methane, Ethane, Propane, Butane, Alcohol Hydrogen Gas, Natural Gas, Acetone , Naphtha, Sulfide, Gasoline and Volatile Industrial Solvent Sensitivity: Adjustable, Minimum 50PPM (methane) Response time: Instantaneous Warm-up time: <20s Continuous operation time: 9 hours(slightly vary with working condition) Low battery indication: Yes Power supply: 3 * 1.5V AA batteries (NOT included) Product size: 156*66*31mm / 6.1*2.6*1.2in Operating environment: 0~50℃, 0~80%RH Storage environment: 10~60℃, 0~90% RH Weight: Approx. 221g / 7.8oz Package list: 1 * Flammable Gas Detector Note: 1. Due to the difference between monitors and light effects, the pictures may not reflect the actual color of the item. 2. Please allow slight error due to manual measurement. Thanks for your understanding.