Have you ever left your home and wondered if you have forgotten to close the door or windows? With Eve Door and Window Sensor, you will never have to leave home feeling worried again. Eve Door and Window Sensor is capable of sending beautifully charted data to your iPhone or iPad remotely. Siri-enabled and equipped with advanced security, Eve Door and Window Sensor is an essential smart home accessory. Powered by replaceable, long-lasting batteries, Eve Door and Window Sensor is simply elegant and subtle.