SD-670DE (SD-671DE/SD-674DE) Firmware Update Instructions You will need the SD-670DE Series Radio Programmer to complete the Firmware update.
SD-671DE Firmware
SD-671DE (VHF) FIRMWARE Version 1.0.1.9 (Updated 4/13/22) You will need the SD-670DE Series Radio Programmer to update the firmware. Instructions are included in Zip File
SD-674DE Firmware
SD-674DE (UHF) FIRMWARE Version 1.0.1.9 (Updated 4/13/22) You will need the SD-670DE Series Radio Programmer to update the firmware. Instructions are included in Zip File
SD-670D/DE Series User Manual
Last Updated 04/30/2021
SD-670DE Series Spec Sheet
New Version 2.16.24