> Meets all requirements of latest EN54
> Two-wire, polarity-free realizes convenient wiring
> Completes EMC test, it has strong anti-electromagnetic interference ability, high stability and reliability
> Ultra-low consumption and strong loading capacity
> Loud sound output over 75 dB(A) at 3 meters, accompanied with bright alarm signal
> Non-loosening screws on base terminal for easy installation
> Contacts material is highly acid-resistant and rust-resistant
