I haw Garmin Astro 320 and DC40 . They is a Baltic firmware (freequency 155.450 MHz, 155,475 MHz)
Al works good.

Got another DC40 collar, but he is France coded.. Freequencies is 155,600MHZ, 162,250 MHz.
off course my Astro 320 do not work with this collar...
Are is possibility flash my france DC40 collar to Baltic freeqencies?