Detects human presence in motion into the room where the sensor is installed & transmits the information to the In Two Box that gives the warning. Exclusively performing with In Two Box. Distinguishes the presence of a human being from a pet one (dog, cat). Tolerates pet passing through the ground, 2 ajustable positions: Up to 15kg or 25kg. The motion detector is for indoor use only Designation: Wireless infrared motion detector Radio frequency: 868, 3 M Hz Autonomy: up to 4 years in the context of a non-intensive use Detection distance: 15m Power: 1 lithium battery CR123A (supplied) Detection angle: 90.