Features:  * Can be used to detect the leakage of combustible gas including liquefied petroleum gas (LPG), liquid natural gas (LNG), biogas, methane, butane, etc.  * Adopt high sensitivity industrial sensor, highly stable and reliable for gas-leak detection. Easy-to-understand layout, simple to operate.   * 3 color indicators with buzzer show real-time gas-leak status, providing audible and visible alerts to remind users. When the current gas content exceeds the standard, the buzzer will ring, with red light flashing. Yellow light indicates slight leakage while green light means safety.   * Portable pen-shaped design, slim and lightweight for convenient use. Come with a lanyard, easier to carry.   * Widely used in agriculture, chemical factory, research laboratory, gas station, pipeline check and other household devices.     Specifications:  Model: GD-3000  Material: ABS+Electronic Component  Color: Black   Battery: 2×AAA Batteries, 1.5V (NOT included)  Continuous Use Time: about 4H  Working Temperature: 10-50℃  Working Humidity: ≤95%RH  Detector Length: 17.4 * 2.5 * 1.7cm / 6.85 * 0.98 * 0.67in  Item Weight: 30g / 1.06oz (without battery)  Package Size: 24.9 * 8.5 * 3.2cm / 9.8 * 3.35 * 1.26in  Package Weight: 100g / 3.53oz    Package List:  1 * Gas Leak Detector