433 MHz photoelectric smoke detector with built-in 85 dB siren and temperature sensor (57ºC). Complies with the EN54-5 / -7 standard and CPD certificate (Class A1). Low profile design. Automatic detector compensation for dirt to maintain sensitivity level. Sensitivity failure indication (75% obscuration of the capture chamber of more than 120 seconds). Capture chamber easily changeable. Button for local test. Low battery indication. 2 long-life lithium batteries (10 years) of the 3V type CR123. Dimensions: Ø 147 x 53 mm.