A reliable magnetic reed-switch sensor that alerts you instantly via the DMSS app when a door or window opens while armed — no wiring needed, just a compact sensor and magnet pair. Two-way communication with frequency hopping keeps the signal stable, even in busier RF environments like apartment blocks or offices.

Key Features:

• Reed switch sensor, two-way RF with frequency hopping

• Communication range up to 1,000–1,200m in open space

• Low battery alarm, signal strength detection, tamper alert

• Built-in temperature monitoring

• Runs on CR123A battery — up to 3–4 years battery life

• AES128 encrypted communication

• Cloud update with automatic recovery

• Pairs with Dahua ARC wireless alarm hubs & DMSS app

• Wall/frame mount installation