# In-App Marketplace Sing and Earn In-app Marketplace is a place to trade NFT Microphones, NFT Boxes and in-game items like Gems. * After transferring a microphone in/out of a crypto wallet or sending an item in the app, you must wait 24 hours before using/minting it. * Newly purchased microphones from the marketplace can be used immediately. ### Trade System User can buy and sell NFT Microphones, Microphone Boxes and Gems on the in-app Marketplace. ### Rental System Under Development --- # 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://singsing.gitbook.io/singsing/platform/deprecated/application/in-app-marketplace.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.