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