Housing UV resistant polycarbonate CO10 Carbon Monoxide CO Meter, Output Type Jumper selectable 4 to 20 mA loop powered or 2 to 10 V load must be 50 K ohm, Temperature Limits -4 to 122 degree F -20 to 50 degree C

Check co level in all environments A maximum of 1000 ppm ergonomic pocket size housing one, Button operation utilizes a stabilized electrochemical gas specific co fast response sensor Clear and straightforward 1999 count backlit displays co levels from Starting at nil and reaching a thousand ppm 1 ppm resolution, Either 5% or 10% ppm basic accuracy the higher of the two audible alarm starting at 35 ppm with continuous beeping when above 200 ppm memory stores 10 readings backlight for low light conditions max hold along with information storage buttons Power-off function that activates automatically dimensions/weight 6. 3x2. 2x1. 57 160x56x40 mm /6. 35 oz 180 g 2, Year warranty complete with 9 v battery, Protective rubber holster, And carrying case