DAHUA - ARD2251E-W2(868) - Wireless External Triple-Tech Detector

Support anti-masking detection.
Support moving detection to prevent someone move or detach device.
Support the installation of camera modules to form PIR-Cam to implement video verification.
Pet immunity: up to 80 cm, 40kg.
Support environment temperature monitoring.
Supports two-way communication and frequency hopping to make communication with alarm hub stable and reliable.
Features cloud update. You can also remotely update the device on the mobile app.
Offers a dual backup system, and uses auto recovery when an update fails.