MOTOTRBO SL8550 - Frequency band UHF-1, Frequency range UHF (403-470 MHz). XPR3300 - Frequencies 136-174 MHz 403-512 MHz, XPR 3000 Series radios operate in analog and digital mode, XPR 3000 Series uses TDMA digital technology, it delivers twice the calling capacity plus clearer voice communications. For North America (NA) region. US/USA firmware. XPR firmware. M2020 and M2021 releases.