Whistler TRX-2 Desktop Digital Scanner Simple Zip Code programming. Preloaded USA/Canada MicroSD card included. Easy updating via Internet. User upgradable CPU firmware. Spectrum Sweeper. Clock / Calendar. CTCSS and DCS subaudible decoder. Dedicated SKYWARN/Weather button. APCO P25 Digital Phase I & II. Compact, modern case design. Preloaded USA/Canada MicroSD card included. Store Favorites Scan List Dedicated SKYWARN/Weather button. IF Discriminator Out. Tuning Steps: 2.5, 3.125, 5, 6.25, 7.5, 8.33, 10, 12.5 ad 25 kHz.