This is a gas alarm sensor, designed to help you monitor natural gas safety. An ideal safety tool for use in motor homes, marine vessels, and vehicles. It can detect leaks of propane, butane, LPG, natural gas, town gas, coal gas, and other common flammable gases. It is very easy to use and convenient to install. Features: 1. Unique design of alarm sensor body, ensuring high reliability. Simple to install and operate. 2. Constructed from premium materials for safety and stability. Durable for long-lasting use. 3. Two-state indicator lights: red light indicates alarm, while yellow light indicates failure. 4. Comes with built-in and output switch terminal pair for integration into an external alarm system. 5. Suitable for vehicles and marine applications, including motor homes, boats, yachts, etc. Specifications: Condition: 100% New Color: White Material: Metal + Plastic Operating Voltage: 12V DC Standby Current: �� 90mA Alarm Current: �� 100mA Warm-up (stabilization) Time: 180s Alarm Gas Level: 10 �� 5 (% LEL), 0.5 �� 0.25 (VOL %) Alarm Indicator: red LED, flashing Alarm Sound Level: �� 85dB/m Failure Indicator: yellow LED on, continuous tone Operating Temperature: -10��C ~ +50��C Environment Humidity: �� 95 % RH Installation: wall-mounted Size: 11.5*7*5 cm / 4.53*2.76*1.97 in Weight: 151g Note: Please allow 0~1 inch error due to manual measurement. Thank you for your understanding. Package Included: 1 * Alarm Sensor