The Pool Alarm installation is very easy. It sits on the pool deck as shown in picture. After you install the POOL ALARM, it can't be deactivated; it is always in the alarm ready mode until you put it in Sleep Mode. If someone who does not know how to put the POOL ALARM in sleep mode attempts to remove the alarm, it will sound an alarm. The Pool Alarm comes with a remote receiver which can be mounted in your home up to 200 feet from the main unit. It comes with a 12 volt power supply. The Pool Alarm uses one a 9-volt battery (not included) which should last approximately one year. There is a audible low battery indicator which will sound at the poolside alarm and the remote receiver.