# Experimental features ## Experimental features ### TimeLock TimeLock enables you to send Bitcoins that cannot be spent until specified date. The receiver of such transaction should use Erium wallet app version 0.10 or newer with BIP44 address format for the Bitcoin. Only Erium wallet can correctly identify such transactions on Bitcoin network as well as enable receiver to spend those Bitcoins after the lock period expires. Being an experimental feature the maximum amount per transaction is limited to 0.5 BTC. To activate TimeLock feature on your Erium app. 1 Open the Erium app. 2 Press the Settings tab appearing at the bottom of the app. 3 Press the Experimental Feature option from the list. Refer to Fig. 4 4 Press TimeLock. 5 Drag the Activate slidebar. --- # 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://erium-exchange.gitbook.io/erium-guide/wallet-connect/experimental-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.