ZT-MS AC/DC smoke alarms provide smoke detection and alarm functions within a single unit. Advanced electronics in conjunction with a photoelectric smoke sensing chamber provide early detection of smoke and high immunity against unwanted alarms. 

ZT-MS AC/DC smoke alarms are mains powered, with battery backup, suitable for general residential applications. ZT-MS AC/DC smoke alarms provide home owners and installers with an easy-to-install, premium solution for life safety and property protection applications. 

Specifications 
Mains power source  AC 220 V ~ AC 240 V, 50 Hz

Battery power source  DC 9 V battery

Operating temperature 0 °C ~ +45 °C  

Operating humidity 10 % ~ 90 % RH, non-condensing

Alarm sounder output ≥ 85 dB @ 3 m

Interconnection (max) 24 units, 250 m cabling