The SimpliSafe Door Entry Sensor ES3 White is a latest generation smart home device designed to detect entry and exit at your door. With its innovative technology, this door sensor provides an added layer of security for your home. Easy to install and compatible with various home surveillance systems, the ES3 is a reliable choice for enhancing your surveillance and smart home electronics setup. As part of the SimpliSafe brand, you can trust in the quality and performance of this advanced door sensor for your peace of mind.