Battery Powered Door or Wall Mount ExitAlarm The Detex EAX-500 Series is designed for applications requiring a battery-powered alarm on secured doors. The alarm, with approximately 100dB, will sound when an unauthorized exit occurs. The redesigned shape and smaller size of the EAX-500 makes it the ideal choice for quick and easy installations on emergency exit and restricted doors.Main FeaturesSecure, tamper resistant housing9VDC battery operated with Low Battery AlertLED visual and audible arming indicators