The CRT SS 7900v Turbo can operate on , and . In order to enable all the bands:
turn the radio off using the volume button,
hold down the menu and emergency buttons and then power on the radio with the buttons held down using the volume button.
the radio should now display 1 Band
,
turn the frequency selector to switch the display to 2 Band
,
turn the radio off using the volume button,
turn the radio on again and all bands should now be available.
fuss_radio_crt_ss_7900v_turbo_band_switching.mp4
Credits: simonthewizard
Switching to 2 Band
means that the , and bands are available such that the radio will be able to use the frequency range to which includes the citizen band.