Quick view Sirenlock™ Model 250 Paddle Panic Exit Alarm Lock Sirenlock™ Model 250 Paddle Panic Exit Alarm Lock in Satin Anodized Aluminum The Alarm Lock 250 are UL-listed panic alarm deadbolt devices that sound an alarm to prevent illegal usage of exit doors while permitting fast egress in an emergency... $382.27 $305.82 Add to Cart Compare