One-pass app (smart home key) that can be used in the same way as card access to an apartment using the smartphones NFC and Bluetooth※ Required access permission details- Nearby device: Used when using Bluetooth service- Notification access and notification reminder: Used to control detailed GAYO service notification functions- Location: Provides a one-pass service that automatically opens the common entrance door when entering or leaving the apartment common entrance based on the current location.※ Selected access permission details- Contact information: Used for adding household members and issuing passes.- Microphone: Used when using the elevator voice call function-Notification: Used to control GAYO services and provide notices※ To use the GAYO app smoothly, we recommend installing it on a smartphone running Android OS 5.0 or higher.- Website: http://bluen.co.kr- How to contact us:For a quick response, please leave a category and detailed inquiry in [A/S Center -> A/S Reception -> Contact Us] at the bottom of the GAYO app main screen.