Hama Door Window Sensor Zigbee (Smart Magnetic Contact for Heating Thermostat, Security System, Surveillance - Works with Alexa, Google Assistant, Siri)

• No one is there, but the door or window opens: With the Hama window alarm, don't let anything pass. Any movement on windows and doors triggers a message to your mobile phone or the associated siren
• Connected window contact: If the window sensor is connected to a smart heating thermostat via an automation system, the heating will drop as soon as you open a window – saving you heating costs
• Whether you are on your sofa or on vacation: With the Hama Smart Home app, you can check the status of windows, doors and more from anywhere and control your home at any time
• Whether via Amazon Alexa, Google Assistant or Apple Siri: Comfortably ask if the bathroom window is still open by voice control from your sofa
• Box contents: 1x Smart Home window contact, 2x AAA micro batteries, Mounting material (2 adhesive pads), 1 quick start guide, 1 safety instructions

The door should not always be open to everyone. With the window contact, you are on the safe side and informed at all times - whether you have forgotten to close a window or someone is trying to gain access.