Radio dual detector for room monitoring for very reliable detection of movement using passive infrared and microwave technology. The two-stage sensor detection, in which the microwave sensor must confirm a movement detected by the PIR sensor, reliably reports a movement to the System 9000. PIR detection range: 12m x 110° (can be optimized using optionally available interchangeable lenses, e.g. curtain or small animal immune lenses), MW detection: 0.5-20m. Occupies an address in the System 9000. Incl. tamper protection. Radio frequency: 868MHz, MW frequency: 9.35GHz. Power supply: Lithium battery AA 3.6V (LST14500, included). Operating temperature: -10°C to +40°C. Dimensions: 60 x 110 x 52mm.