UPGRADE YOUR SIMPLISAFE SYSTEM: Compatible with your SimpliSafe home security system (3rd Gen). Add up to 100 accessories for customised home protection. Pair with the SimpliSafe Temperature Sensor for ultimate environmental protection FEATURES: Immediately be notified of possible home flooding and leaks with the SimpliSafe water sensor. Early warning prevents extensive damage before it happens INSTANT NOTIFICATIONS & ALARM: Triggered when water connects 2 of 6 metal pins, the water sensor sends a phone notification & activates the SimpliSafe Base Siren. App features require premium subscription READY TO USE: Ready to work right out of the box, your water sensor comes with pre-installed with batteries, simply place it on the floor where flooding or leaking is likely EASY TO SET UP: Place it on any floor and 'add device' with your SimpliSafe Keypad. You must have the SimpliSafe system to be able to use the Water Sensor