Low profile Carbon monoxide (CO) detector with radio technology compatible with Alexor PC9155 system and Power v4.5 or higher. LPCB and CE certified. It incorporates a siren of 85 dB at 3 meters. With monitoring for malfunction, low sensitivity and battery condition. Indication LEDs: Red for Alarm, Yellow for Fault and Green for Power. It has silent operation, wall tamper. Battery life of 3-5 years. Powered by a CR123A battery. End of useful life (EOL) indicator (5 years). Dimensions: Ø 120 x 36 mm.