This for sale listing is for one unit.
Adds secure military style Frequency Hopping to your ICOM radios.
With user selectable hop rates, and selectable hop bandwidths.
Adds Send and Receive 4 digit (Barrett, Codan etc) CCIR493 Selcall to your ICOM.
Suits ICOM IC706, IC7000, IC7100, IC7200, IC7300 etc
For technical details and operational videos, see the website: http://home.lizzy.com.au/syntor/JOEY.html