For use with DSC  433MHz Wirleless Alexor Alarm Systems Only. 

Wirleless CO Detector - WS4913EU 433MHz 

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.
Point of Difference with Electrochemical Sensing
Due to perhaps a home heating system malfunction, there can be a resulting build up of carbon monoxide in the home. The WS4913's electrochemical sensing technology is highly sensitive, detecting even trace amounts of carbon monoxide. Once CO is identified, the sensor is triggered, the alarm is activated and the Alexor Wireless Panel is signaled. The detector sounds the 85dB alarm to warn residents to leave the home immediately and at the same time signals the Alexor Wireless Panel to alert responders. Although the WS4913 works in tandem with the Alexor Wireless Panel, it also works as a standalone detector - not connected to a panel - providing an alarm warning to residents inside the home.
Important Messages Transmitted to Panel
Besides alarm communication, the WS4913's wireless function offers the transmission of important messages to the panel, through either explicit or generic trouble indications, including: trouble, end-of-life (EOL), tamper and battery conditions.
Ideal for Hard-to-Wire Locations
With its compact design, battery power and wireless capability, the WS4913 is the perfect solution for difficult to wire locations.
Secure, Continuous Communication
The WS4913 offers fully supervised, continuous communication with the Alexor Wireless Panel.
Compatibility
Alexor Wireless Panel
FEATURES

    Slim-line design
    Built-in 85dB alarm at 10 ft (3 m)
    Malfunction supervision
    Low sensitivity supervision
    Electrochemical sensing technology
    Transmits RF status, low battery and tamper condition
    Hush feature
    Wall tamper
    Onboard LEDs indicate:* Red - Alarm, * Yellow - Trouble, * Green - Power
    3-5 year battery life
    End-of-Life (EOL) indicator (5 year)
    Low battery supervision