PRO2004.10 With so many channels to program, one dreads the thought of a power failure, which could clear memory in a hurry. Not to worry, the PRO-2004 memory is backed up by a conventional 9 volt alkaline battery (not sup- plied). The 300 channels are divided into 10 banks of 30 channels each, and one can select or deselect any channel bank from the scan list. Individual channels can be locked out in the customary way, but the PRO- 2004 provides a new feature, a LOCKOUT REVIEW. Succes- sive depressions of this key step through the locked out channels. The owner's manual refers to the ability to delete a channel by storing a 0 frequency in it, not a particu- larly useful exercise. The scanner will still spend time scanning a "deleted" channel unless it is locked out with the LOCKOUT key, which then means it appears in the lockout list when using the LOCKOUT REVIEW feature. Scanners worth their keep have a priority feature, with channel 1 usually designated the priority channel. The PRO-2004 is more flexible; any of the 300 channels may be designated the priority channel. When the PRIORITY key is depressed, that channel will be sampled every 2 seconds, and the radio will stay there if a signal is heard. The PRO-2004 has two scan speeds, although one would probably use the faster, 16 channel/second speed in most instances. This compares favorably with 14 channel/second speed of the Bearcat 800XLT. When programming a channel, the PRO-2004 firmware sets the mode automatically, based on its idea of what mode is most prevalent on that frequency. This feature saves extra keystrokes, and makes one appreciate the thought that went into the design of this radio. The default mode can be overridden easily, if need be, like to listen to a NBFM satellite in the 225-400 MHz range, which is mainly populated with AM signals.