Elevate your home security with the Smart WiFi Door Sensor - a wireless window sensor that sends app notifications when doors or windows are opened. This innovative device requires no hub, making installation a breeze. With compatibility for Alexa and Google Assistant, you can seamlessly integrate it into your smart home ecosystem. Stay alert and safeguard your property with real-time notifications on your smartphone or tablet. Measuring 3.1 x 1.8 x 1 inches and weighing 2.4 ounces, this compact sensor is designed for effortless setup and discreet placement. Ensure your family's safety with the Smart WiFi Door Sensor.