AC/DC Operated Ionization Type Smoke Alarm

Model : VST-IS598I
Ionization sensor for fast flaming fires
Insects Proof
High and stable sensitivity: 0.61~1.92%/ FT.OBS.
Operated with 220--240V AC 50Hz mains and 
backup with single 9V DC(6F22) block battery
Compact size: 110mm diameter 
With wall mount plate set and simple AC connector for easy installation
Inter-connectable up to 40 Heat And/Or Smoke Alarms 
2 color LED indicator (Alarm and AC power indicator)
Extra loud alarm sound over 85dB
Low-battery and battery missing warning indicator
Self-test button
 auto-reset when smoke clears
CE, BSI, SAI Global approved, comply with EN14604, AS3786 and UL217 standard