The FLEX-6400/6600 Extended Transmit Module is a supplementary bandpass filter module that can be user installed in a FLEX-6400 or a FLEX-6600 series radio which will allow for transmitting outside of the ham bands.
This module is required for MARS, Shares, or other users who require out of amateur band transmit capabilities. An approved and in-date government-issued license is necessary to purchase this option. Once the Extended Transmit Module is installed, a TURF file is required to activate the module and can be provided by our technical support team via a HelpDesk support ticket.