The Tapo T110 Smart Door Alarm is an innovative solution for home security, offering real-time monitoring of your doors and windows. This white sensor is powered by a 3.7-volt battery and includes a battery in the package. It is compatible with Google Home for smart home integration and is suitable for use in your home. The device measures 8.5 inches in length and 2.4 inches in width, making it discreet and easy to install. With a reliable delivery service and 30-day returns policy, this Tapo product ensures peace of mind for your home security needs.