Features: Compact Gas Leak Detector with advanced sensors technology instantly identifies CO and combustible gas leaks, triggering loud alarms and flashing LED alerts for enhanced home safety. Features easy install design with LCD concentration display, manual mute button, and selves test function, while the optional double gas model monitors both CO and flammable gas simultaneously. Designed for households, landlords, and property managers needing not professional setup to safeguards against threats in residential environments. Optimized for kitchens, garages, and utility rooms where gas appliances operate, ensuring round the clock protections from hazardous gas accumulation. Complies with US safety standards with automatic error diagnostics (Err code display) and alarm memory recall, housed in ABS plastic for long term reliability. Specifications: Component:ABS Detect Type:Combustible Gas & Carbon Monoxid, Carbon Monoxid Working voltages: AC90~240V Standby current: <15uA Carbon monoxide gas measurement ranges: 50-999ppm Response ranges: ≥100ppm, alarm within 3 minutes Use environment: Temperature: -10°C~55°C Relative humidity: <95% (not condensation on) Alarm methods: sound and light alarm, with LCD display Alarm volumes: >85dB (within 1 meter) Yellow light: fault Red light: CO alarm Green light: Power supply Package Includes: 1Piece Gas Detector note: Please allow 1mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.