if not using HIFI do i need to do both or just control box ?, info via dgc email

WHEN UPDATING YOUR SYSTEM, DOWNLOAD BOTH THE CONTROL BOX AND CONTROL SET UPDATES AND STORE TO A USB STICK. HiFi USERS MUST ALSO DOWNLOAD THE NEW VOICEPACK.
BLUETOOTH USERS: NOTE THAT THE CONTROL SET CAN NOT BE UPDATED IF THE CONTROL SET IS NOT PLUGGED INTO THE CONTROL BOX DURING THE UPDATE.