Dahua Alarm Hub 2 Kit WiFi/4G (Hub+PIR+Keyfob+Door) ARC3800H-03-FW2 (868Mhz)

Supports alarm video verification through integration of the IPC with the hub.
Images can be remotely and quickly transferred from the PIR-Cam to the device.
Features voice call alarm.
Supports wired and AP network configuration methods, which makes it easier to add the hub to apps and to switch to the hub's network.
Supports multi-network redundancy for Ethernet, Wi-Fi and 4G networks to ensure the network remains stable and reliable.
Supports two-way communication and frequency hopping to make communication with wireless peripherals stable and reliable.
Features cloud update. You can also remotely update the device and wireless peripherals on the mobile app.
Offers a dual backup system, and uses auto recovery when an update fails.