Dahua AirShield Long Ranger Testing

ARD2251E-W2(868V)
Support anti-masking detection.
Support moving detection to prevent someone move or detach device.
Supports video verification.
IR illumination range of 15 m at night.
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.