GENERAL DESCRIPTION This is a battery-powered carbon monoxide alarm with a digital display. It features a built-in electro-optical sensor for high accuracy and stability. The alarm provides both audio and visual warnings when dangerous levels of carbon monoxide are detected. TECHNICAL SPECIFICATIONS Product Name: Carbon Monoxide Alarm Power Supply: 2 x 1.5V AA batteries (not included) Measurement Range: 0-999 ppm Alarm Sound: ≥75 dB (1m in front) Alarm Concentration: 50 ppm (bright screen), 150 ppm (alarm) Working Environment: Temperature -20 to 60°C, Relative Humidity ≤95% Product Life: Up to 10 years Product Dimensions: 10 x 10 x 4 cm COMPATIBILITY AND ACCESSORIES Suitable for use in residential areas, shops, hotels, restaurants, office buildings, schools, banks, libraries, computer rooms, and warehouses. Includes a certificate, manual, installation screws, and a color box.