- Two-bus system with polarity
- Sealed, dust-proof, insect-proof, and anti-back pressure
- Sleek and beautiful thin appearance
- Stable anti-noise communication technology
- Address set 1-99
- Two-color, two-LED design that provides a 360-degree viewing Angle
- Blinking green in normal state and steady red in alarm state
- Automatic testing with built-in magnetic test switch or panel control
- Implementation standard: CCCF