First Alert CO400B Carbon Monoxide Alarm, Removable Battery, CO Detector, Electrochemical 6926K75 Class CC Series ATQR Speed Class CC Series ATQR Speed Time Delay Amps 4A AC Voltage Rating 600V AC DC Voltage Rating 300V DC Visual Indication Non Indicating Interrupt Rating 100kA at 300V DC Valve Function On Off Valve Type Gate Actuation Manual Valve Operation Handle Handle Style Wheel Handle Type Standard Handle Material Iron Shape Straight Fitting Type Connector Connection Type Pipe Connection Style Threaded Pipe Size 1 2 Gender Female Thread Type NPT Flow Coefficient (Cv) 17 Number of Tandem Detectors Not Applicable Overall Width 4