The Poolguard Pool Alarm, once installed in the pool, cannot be deactivated; it is always in the alarm ready mode. Tamper proof - Poolguard Pool Alarm will sound an alarm when removed from the pool. When you would like to use your pool, simply remove the alarm from the pool and put it into sleep mode. This pool alarm will automatically wake up and run a system test when installed into the pool. It comes with an in-house remote receiver that has a range up to 200 feet and comes with a 12V power supply. The Poolguard Pool Alarm runs on a 9V battery (not included). This alarm is also equipped with an audible low battery indicator. New sensing technology povides less chance of false alarms due to wind, rain or small objects such as sticks or toys entering the water.