DHI-ART-ARC3800H-03- FW2 – Wireless Alarm kit

Dahua Wireless Alarm KIT

Supports connecting up to 8 IPCs in the same LAN
Supports in-hub pre-recording, so the camera doesn’t need a SD card
Supports two-way voice intercom with intercom siren
Supports accessing Internet via Ethernet, Wi-Fi, and 4G
Supports voice call alarm and SMS alarm

Supports connecting up to 150 wireless peripherals, including up to 4 sirens, up to 4 repeaters, up to 8 keypads, up to 8 2.4G PIR-Cams, 56 Sub-G PIR-Cams, up to 64 keyfobs, up to 256 MIFARE One cards (8 cards per keypad user)

https://www.dahuasecurity.com/products/Alarms/Wireless-Alarm/Kits/ART-ARC3800H-03-FW2