The Qolsys QS1133-840 IQ DOOR WINDOW-S Sensor is an encrypted sensor with superior range specifically designed to easily attach to any door or window. With a five year battery life and a slimmer form factor than other full sized sensors it can alert you if a door is left open, automatically adjust your smart thermostat to save you energy, and provide security for anything that opens or closes. Know when these doors and windows are opened with customizable chimes and unique names spoken by the panels text-to-speech. Create personalized notifications and rules with the interactive app.