Wireless motion detector that notifies the owner of the first signs of home or office intrusion. The detector is fastened to the wall in front of the doors and other places likely of intruder entry. The device detects human presence by IR level using a passive IR sensor. The data received is digitally processed in order to prevent false alarms. The device automatically increases or decreases the sensor sensitivity in order to accurately detect motion during hot and cold weather. The additional microwave sensor filters possible interference from the air conditioner and curtain movementIgnores cats and dogs with a weight of up to 20 kg and height of up to 50 cmMicrowave sensor detects and ignores draughts, movement of curtains and blinds, light flickering, glare, and reflections Alarm signal delivery time of 0.15 sMaximum detection distance of 12mAccurately detects motion in heat conditions, even at a temperature of +40°СOperates up to 5 years without battery