The poolguard pool alarm, once installed in the pool, cannot be de-activated; it is always in the alarm ready mode. tamper proof: poolguard pool alarm will sound an alarm when removed from the pool. sleep mode: when you would like to use your pool, simply remove the alarm from the pool and put it into sleep mode. automatic wake-up: the poolguard pool alarm will automatically wake up and run a system test when installed into the pool. the poolguard pool alarm comes with an in-house remote receiver that has a range up to 200 ft. and comes with a 12 volt power supply. the poolguard poolside alarm works on a 9-volt battery (not included); with a battery life of approximately one year. audible low battery indicator at the poolside alarm is also indicated by the in house remote receiver. new sensing technology provides less chance of false alarms due to wind, rain or small objects such as sticks or toys entering the water. poolguard pool alarms have been tested and comply to the astm standar. Poolguard alarm should not be placed too close a return line