and the protocol multiplexer settings needed to connect to each of them. Each service is identified by a Universally Unique Identifier (UUID), with official services (Bluetooth profiles) assigned a short form UUID (16 bits rather than the full 128).
In order to establish connections, specific protocol multiplexer settings were necessary for each device. Services are distinguished by unique identifiers (UUIDs), and official services (Bluetooth profiles) have shorter versions of these IDs (16-bit rather than the standard 128-bit).