Sensitive only to a fixed temperature Less nuisance alarms due to contamination, dust, and insects Operated with single 9V DC block battery With wall mount plate set for easy installation LED operation indicator Alarm point: 135°F (58°C) fixed temperature triggers alarm Horn output: 85 decibels at 10 feet Low battery warning indicator Self-test button CE and FCC approved Compliant with the EN54 standard BV ISO 9001:2000