Your Regency M100 is a compact, programmable 10 channel, three band, FM monitor receiver for use at home or on the road. It is a double conversion, superheterodyne used to receive the narrow band FM communications in the amateur, public safety and business bands: 30-50, 144-174 and 440-512 MHz.
Sophisticated microprocessor-controlled circuitry eliminates the need for crystals. Instead, the frequency for each channel is programmed through the numbered keyboard similar to the one used on a telephone. A “beep” acknowledges contact each time a key is touched.

Any combination of two to ten channels can be scanned automatically, or the unit can be set on manual for continuous monitoring of any one channel. In addition, the search function locates unknown frequencies within a band.

Other features include scan delay, priority and a day/night switch to control the brightness of the 12-digit Vacuum-Fluorescent display. The M100 can be operated on either 120 VAC or 12 VDC.