complied with EN54-2&4, 1-32 zone,battery protection, reliable, good price, nice looking Introduction:AW-CFP2166 series conventional fire alarm panel ... SOUNDERS.It has EVACUATE button to start a manual fire alarm immediately.It has battery low protection function, when battery voltage ... is on.It has an optional GSM module for fire alarm by SMS .It is economic, user-friendly and easy maintenance ...