General description 10 Year Life Carbon Monoxide Alarm with Digital Display is a reliable and essential safety device designed to detect harmful levels of carbon monoxide (CO) in various environments. Featuring a built-in electro-optical sensor, this alarm ensures high consistency and stability while providing a beautiful appearance. It is suitable for residential areas, shops, hotels, restaurants, office buildings, schools, banks, libraries, computer rooms, and warehouses. Technical specifications Measurement range: 0-999 ppm Alarm sound: ≥75 dB (1m in front) Alarm concentration: 50 ppm (bright screen), 150 ppm (alarm) Working environment: temperature -20~60℃, relative humidity ≤95% Product dimensions: 10 x 10 x 4 cm Battery: DC3V (2 x 1.5V AA batteries, not included) Product life: up to 10 years Usage The carbon monoxide alarm features an audio and visual warning system. When a dangerous level of CO gas is detected, it emits a loud 75 decibel alarm beep sound accompanied by a