About the S.R Smith PSX320 Pool Alarm, PoolSonix Door/GateA pool can provide hours of enjoyment for your friends and family, but there always lies the danger of leaving young children and pets unattended in your backyard. Accidental drowning is one of the leading cause of deaths for young children 14 and under. Have the peace of mind knowing that your loved ones will be safe by adding a complete security system to your pool with the S.R Smith PSX320 Pool Alarm, PoolSonix Door/Gate. Fences act as a barrier, but whenever a pet or child opens a pool gate unsupervised an accident may occur. This device gives you the opportunity to take action and save lives. The PoolSonix is a must have safety device for all families with small children and pets Can be used alone or along with the PoolSonic Pool Alarm System (PSX300).WARNING: PoolSonix is designed to alert responsible adults to unwanted swimming pool intrusions. IT IS NOT A LIFE SAVING DEVICE. Immediate intervention by a responsible adult is required when the alarm sounds. Active adult supervision is the first and most important layer of protection for any pool. PoolSonix is not a replacement for active adult supervision or a direct replacement for any other supplemental layer of protection, including, but not limited to, lifeguards, fences, gates, pool covers and locks. PoolSonix detects the signature wave associated with accidental drowning it may not detect slow, gradual water entry.Special Note: A majority of the necessary parts and accessories from SRSmith Catalog are listed on our website. Please be aware of what you are ordering before placing an order for the item. If you have any questions please let us know, and we would be more than willing to help you in getting the correct part for your application or adding a part from the catalog.