Double-volume digital detector "infrared / microwave" with active anti-mask (meets EN50131-1 Grade 3 standard) and the exclusive ACT technology. Coverage of 15m / 98º. The technology ACT (Anticamuflaje) commutes to microwave mode, to avoid attempts to camouflage the PIR channel or the ineffectiveness of the PIR channel at high temperatures. Compatible with BUS Risco, which allows diagnosis and remote adjustment, in addition to simplifying the wiring. The detectors in BUS, have an extra entrance to connect a contact or any conventional detector of relay. Anti-masking of the microwave channel and the PIR channel.