# Connecting with RelayKeys There are 3 broad configurations for RelayKeys * Wired Mode. This is where one Bluetooth dongle is in the Sending device * Wireless Mode. This is where a Bluetooth dongle plugged into a power outlet or a battery sits away from the Sending device. This might be useful for devices where you cannot plug anything into the sending device * Wired + Receiving Dongle. A receiving dongle sits in the receiving device. This is useful where "pairing" is unreliable on the recieving device or there is no Bluetooth stack on the receiving computer. You need to decide what is best for you. --- # 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://docs.acecentre.org.uk/products/relaykeys/installation/connecting-with-relaykeys.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.