Busch-CO Alarm ProfessionalLINE, studio white, smoke detector/heat detector/CO detector, Busch-CO Alarm ProfessionalLINE, Busch-CO Alarm ProfessionalLINE carbon monoxide detector with electrochemical sensor. Suitable for connection to external systems such as Busch-free@home via the Busch-CO-Alarm RF radio module in combination with the Busch-free@homeAlarm stick. Built-in lithium battery with a service life of at least 10 years. With test button and mute function. 3-stage signaling and alarm concept. LC display to show the current CO concentration (from 30 ppm). Acoustic alarm with 85 dBA at 3 m. Up to 20 detectors can be networked via radio module (6828-12). Tested according to BS EN50291-1:2010 and BS EN50291-2:2010.