This gas alarm sensor helps monitor natural gas safety and is a reliable safety device for use in motor homes, marine environments, and vehicles. It detects leaks of propane, butane, LPG, natural gas, town gas, coal gas, and other common flammable gases. Simple to operate and easy to install.Features: 1. Unique alarm sensor design with high reliability. Easy to install and operate. 2. Constructed from high-quality materials for safe, stable, and durable long-term use. 3. Dual indicator lights: red light indicates alarm condition, yellow light indicates sensor failure. 4. Built-in output switch terminal pair for integration with external alarm systems. 5. Suitable for vehicle and marine applications, including motor homes, boats, and yachts. Specifications: Condition: 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, continuously lit with continuous tone Operating Temperature: -10C ~ +50C Environment Humidity: 95% RH Installation: Wall-mounted Size: 11.5 x 7 x 5 cm (4.53 x 2.76 x 1.97 in) Weight: 151g Note: Allow 01 inch variation due to manual measurement.