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Did you know that you can SAVE A FORTUNE on your Radius radios!

All SP10, SP21 and SP50 Motorola Radius Radios are completely communication-compatible with our Motorola
RM-series radios. And, they have the same power, range and frequency settings.

Each Radius SP10, SP21 or SP50 radio is either a UHF or VHF radio.
This can be distinguished by the model number on the back of the unit.

If the third character of the model number is a "3" then the radio is a VHF model.
If the third character of the model number is a "4" then the radio is a UHF model.

These radios may be found here:

Motorola RM Radios

Any UHF SP10, SP21 or SP50 is compatible with:

RMU2040 - RMU2080 - RMU2080d - RDU4100 - RDU4160d

Any VHF SP10, SP21 or SP50 is compatible with:

RMV2080 - RMM2050 - RDV5100

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