These detectors were manufactured in March, 3rd 2018
The expiration date on the detector says March, 2023

ALL Carbon Monoxide detectors, regardless of make, model or company. Is to be replaced 5-6 years AFTER installation of a new device to insure proper Carbon Monoxide readings! 

These units will need to be replaced in the year 2028 if installed in 2023


Greater Protection. Complete Security. How would you like to offer your customers a security system that provides complete security via a host of devices, including keypads, sirens, detectors and wireless keys, and also supports GSM and IP communications – all of it wirelessly? DSC’s 2-Way Wireless Security Suite delivers just that…and so much more. The Best Warning Device Colorless, tasteless, odorless but deadly, carbon monoxide (CO) is impossible to detect without a warning device. The WS4913 Wireless Carbon Monoxide Sensor, is a 1-Way wireless device but is compatible with DSC’s 2-Way Wireless Security Suite – including the ALEXOR Wireless Panel. The WS4913 provides front-line protection against the silent threat of carbon monoxide poisoning.