Generates a connection on this phone and display a QR code that can be scanned by another Android device. Scanning the QR code with left menu→Photo on the other phone will generate a connection, by which it will receive or send all data from or to this phone.
Send to: Send from this phone to another phone. This phone contains the data, the phone that scans the QR will receive the data via this connection.
Receive from: The current phone receives the data from the other phone that scans the QR code.
Home net: Generate a connection that is only usable when both phones are connected to the current modem.
Internet: Generate a connection that is also usable over the internet. This makes use of ICE (Interactive Connectivity Establishment). Sometimes a direct connection is impossible, in that case a TURN-server is used. You can specify a TURN-server in left middle menu→Mirror→Turn server.