The Gate Alarm can be installed on any pool gate, outside door, or screen. If a child opens the gate, the alarm sounds in 7 seconds, even if they close the gate. Under all conditions, the alarm is always on and always resets itself. The alarm will prevent someone from mistakenly leaving your gate open for children to pass-through. The gate alarm has an adult pass-through option, which allows adults to enter the gate without the alarm sounding.