Features: Compact Structure & Super Light Weight: portable to use and store, providing you a better using experience. High Precision & Fast Response: adopts gas-sensitive semi-conductor sensor for fast detecting and has wide reaction range(50~1000ppm). 6.6-inch Long Probe: the long probe allows you to freely detecting in a narrow place. Visible & Audible Dual-way Alarm: when combustible gas leakage is detected, the buzzer will sound and the concentration indicator will be on. Low Power Consumption: powered by 2pcs AAA batteries (NOT included), with low battery indication, long standby and easy for replacement. Auto Power Off: when no concentration is measured within 5 minutes, the meter will automatic shutdown. One button to power on-off manually. Specifications: Material: ABS Sensor: Gas-sensitive semi-conductor Reaction Range: 50~1000PPM (methane) Reaction Sensitivity: Approx. 500ppm: Approx. 2s Alarm Mode: Visible and audible Operating Condition: 0~50℃, 20~80%RH Storage Condition: -10~60℃, 20~80%RH Power Supply: 2 * 1.5V AAA battery (NOT included) Item Size: 330 * 40 * 26mm / 12.99 * 1.57 * 1.02in Item Weight: 52g / 1.85oz Package Weight: 93g / 3.29oz Package Size: 34 * 5.5 * 3.5cm / 13.59 * 2.17 * 1.38in Packing List: 1 * Gas Detector 1 * Manual (English)