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

Dahua ARD2251E-W2(868) — ARD2251E-W2(868) Wireless External Triple-Tech Detector. Key Features & Specifications 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 verific