AC/DC Operated Type Heat Alarm

Model : VST-H598I 
Fixed Temperature Heat Alarm
The heat alarm is sensitive only to a fixed temperature- Less nuisance alarms due to contamination, dust, and insects.
Operated with 220-240 VAC 50Hz mains and backup with single 9VDC block battery
With wall mount plate set for easy installation.
Alarm and AC power supply indicator
Horn output: 85 decibels at 10 feet. 
Inter-connectable up to 40 units
Low-battery and battery missing warning sound
Self-test button
Auto hush function when temperature is below alarm point.