Continuously monitor gates on elevated levels with this Tilt/Lift-out Gate alarm system that helps reduce accidents, workers comp claims and OSHA safety violations. Amber LED lights on both front and back of the alarm flash when the gate it is mounted to is left open. A loud audible alarm also sounds. Alarms may be temporarily silenced for up to 2 minutes by pressing a snooze/acknowledge button while activity through the gate takes place. Once the gate is closed, pressing the snooze/acknowledge button re-activates the alarm, or you may choose to let the automatic reset take place when time is up on the alarm's internal timer. The alarm operates on AC or battery power.