The GRE PSR-100 is an affordable scanner with innovative features. 200 memories and five pre-programmed bands (Marine, Fire/Police, Air, Amateur and Weather). There is also a built-in priority channel. The weather alert capability features SAME receiving with 10 FIPS area memories plus there is a Skywarn function. There is a lock-out review key to confirm lock frequencies. There is a key lock for safety and the LCD is backlit. You can turn on the display’s backlight for easy viewing in the dark. The Spectrum Sweeper features allows you to sweep the entire range of the scanner’s design frequencies, or you can specify those frequency ranges that you wish to sweep and exclude ranges that you do not want to sweep. This allows you to omit frequency ranges with constant strong frequency activity, such as those with paging or broadcast transmitters. This radio is PC programmable and supports unit-to-unit cloning. There is a 9VDC external power jack and an earphone jack (3.5mm stereo). The PSR-100 comes with a flexible BNC antenna, belt clip, manual, AC adapter, alkaline battery holder and rechargeable battery holder. It requires four AA cells (not supplied). This scanner has a built-in charging circuit that lets you charge nickel-metal hydride (Ni-MH) or nickel cadmium (Ni-CD) rechargeable batteries (not supplied) while they are in the scanner. To charge rechargeable batteries, you need to use the supplied AC adaptor.