# Key Features * **Effortless Attendance Taking**: Simply open the app when you are in supported venues, and your attendance will be automatically recorded. * **Attendance Tracking Made Easy**: Access your attendance history over the past 180 days right at your fingertips. Stay informed and keep track of your participation with ease. * **Privacy Assurance**: Your privacy is our top priority. We use Bluetooth technology instead of GPS, so your location outside HKU premises is never tracked. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://userguide.hku.hk/hku-attendance/key-features.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.