The Sun Proof is used to check the uv index. The default location is based on your device's address, but you can also ask the uv index in other cities. The Sun Proof can also provide you protection tips based on your local uv index. The Sun Proof can be engaged by the following phrases: 1) "Alexa, open sun proof." 2) "What's the uv index now." or "What's the uv index in Seattle Washington." 3) "Give me some protection tips." The Sun Proof is brought by Yanliang Gu and Lanjie Xu. If you have issues, questions, or comments, please email us at leogu0727@hotmail.com. We would like to hear from you.