SimpliSafe ES3 (4-Pack) Entry Door Window Sensor White 3rd Generation

Fits on all types of doors and windows

Magnet can be placed up to 2" from the sensor

Setup is easy: Place it on any door or window and 'add device' With your SimpliSafe Keypad

Chimes when your door or window opens, letting you know someone is entering

Ready to work right out of the box, your entry sensor comes pre-installed with batteries and adhesive

Compatible with your SimpliSafe Gen 3 home security system.

Optional installation tools included for your convenience -- 2 screws and a Mounting plate.

Add up to 100 sensors to the base of your SimpliSafe home security system. (Latest Generation)