Digital LCD Display – Auto/Manual Zero – Fast Sampling – Max Hold, Data Hold – Auto Power Off – Three Year Sensor Life – Safety Alarm: Above 200ppm, Alarm Sounds Continuously – Operating Temperature: 0-50o C – Measurement Range: 0 to 1000 PPM – Accuracy: +/- 15% or +/- 10 PPM – Battery: 9V (Included) – Sensor Type: Stabilized Electrochemical Gas-Specific (CO) – Dimensions: 6.29” H x 2.17” W x 1.57” D – Weight: 5.50 oz.