General Description The carbon monoxide detector is an essential safety device, equipped with an advanced electrochemical CO sensor. It guarantees fast and accurate detection of carbon monoxide levels, emitting an alarm of over 85 decibels when the concentration exceeds safety thresholds. For optimal protection, it is recommended to install one on each floor of your home and in each bedroom. Technical Specifications Item: Carbon Monoxide Detector Power Supply: 2 x 1.5V AAA Batteries (Not Included) Sensor: Electrochemical Operating Temperature: 0-70°C Operating Humidity: 10% - 95% Relative Humidity Detection Concentration: 0 ~ 999 ppm Alarm Indication: LCD Display, Sound & Light Signals Alarm Standard: Alarm at 30 ppm with real-time concentration display, Audible Alarm at 100 ppm Compatibility & Accessories Suitable for use in kitchen, bedroom, bathroom, warehouse, hotel, car, parking lot or barbecue. Includes: 1 carbon monoxide detector, 1 user manual, 2 screws, 2 3M adhesives.