Theta sensor ultrasonic and PIR

Ultrasonic Dual Technology Sensor. For indoor use only. Integrates PIR and ultrasonic sensor technologies for a blend of the best features of both types. The PIR component is more resistant to noise and airflor variations, and the ultrasonic component offers high sensitivity to movement. Does not require unobstructed line-of-sight. Offers highly reliable performance with minimum risk of false triggering.