The Model DD-103 Universal Digital Dial works with any receiver and most transmitters by counting only the VFO signal.  SEE RADIO LIST  It even works with receivers that have some reverse tuning bands like the R388 or Drake 2B.  All of the VFO and band information for many receivers and transmitters is pre-programmed into the display's memory. This allows the operating frequency to be displayed by counting only the VFO signal.  There is also a manual program mode that lets you program the dial for any receiver or transmitter (up to 32 bands) that is not pre-programmed.   Each band can be individually calibrated to allow for crystals that have aged or any other error no matter where is comes from, to 10Hz accuracy.  The calibration information is also stored in memory, so that any time you return to that band, the display is automatically calibrated.  You only calibrate each band one time.  There is also a BAND CTR (COUNTER) that has no offset, that is available any time so the unit can double as a bench counter up to 40MHz.  The DD-103 uses a TCXO for it's reference which provides very high accuracy and stability.  Signal and power cables are included. Also included with the DD-103 is a tube shield and interface circuit assembly.  It is used when connecting to high impedance VFO circuits.  Also included is a wall wort plug-in power supply.