Pro-2051
From The RadioReference Wiki
The same scanner as the Uniden BCT8 but with silver colored control panel (like all other newer Radio Shack scanners). It has one feature that it is not found on the BCT8 that is: Signal Stalker™ (identical to Uniden's Close Call™ feature) RF Capture Technology - Instantly tunes to signals from nearby transmitters.
Comparison Chart on Desktop scanner's below (Pro-2018, Pro-2051, Pro-2052 and Pro-2096)
Desktop Scanner Comparison Chart (pdf format)