10-year carbon monoxide alarm Carbon monoxide alarm with built-in 10-year lithium battery Electrochemical sensor individually calibrated and tested in a CO environment Test/mute switch Memory function Status LEDs (operation, alarm, fault) Tested and validated according to EN 50291:2001, EN 50270:1999 and EN 60335-1:1994 5-year guarantee 10-year service life Optionally wirelessly networkable, without LCD display