Application Notification Seamless Integration With Hubitat Hands-free Control With Alexa Echo Devices Versatile Home AutomationDescription:Product weight: 31 gProduct size: 6.76 x 5.08 x 10.16 cmMaterial: PCVoltage: 3 volts (DC)Wattage: 240 milliamps_ HoursFeaturesCompatible with built-in hub: To use door and window sensors, a built-in hub is required. Please note that the hub is sold separately. (Not all Amazon Echoes come with a built-in hub, but for those who do, it allows you to freely create a smart home that is more local focused.)Smart Home Automation: door and window sensors can automatically control other supported accessories through daily programs, such as home assistants, Hubitat, or Alexa Echo devices - including Echo 4th generation, Echo Plus 1st and 2nd generation, Echo Show 10 2nd and 3rd generation, Echo Studio, Eero 6, and Eero Pro6.Get notification and on-site careful inspection: Get immediate access to door and window sensors on your smartphoneApplication notification, doors and windows open/closed. By using voice commands, you can easily see the open/closed status of doors and windows, and control the program/scene, making you worry free.Easy setup: The mini sized smart contact sensor is easy to install and requires no tools. It can be detected through the Alexa Echo device using the command "Alexa, discover device".You will receive: 3 packages of x door sensors, 1 user manual, 1 x paper clip, and 1 double-sided sticker. If you have any questions, please feel free to contact us at any time.Package Included:1 set * (1 door sensor, 1 user manual, 1 paper clip, 1 double-sided sticker)