In the Ezurio part number scheme ConnexLink is abbreviated as CL at the beginning of the part number. For example, when looking at a part number like CLAAAA-BBBB-XXXX-ZZ the AAAA = 4490, 4790, 4424 and 2510 are the family names. The BBBB = typically indicates the output power in milliwatts, XXXX = typically indicates the serial connectivity. 232 for RS-232, 485 for RS-485, and ZZ = indicates any special configurations. SP is a Starter Pack with two radios, preconfigured to communicate with each other.