Arm your emergency exits and restricted doors with our low-cost, battery or AC-powered door alarms to prevent unauthorized door use. When the 100dB horn sounds, no one sneaks away. Rugged and tamper-resistant when armed, these alarms are constant sentinels. Combine them with Detex magnetic door switches to monitor door positions or trigger the alarms, and you'll have state-of-the-art monitoring in one compact package.