The GRE PSR-500, PSR-600, Radio Shack PRO-106, PRO-197, PRO-651, PRO-652, and Whistler WS1040, WS1065 can all be cloned to each other and use the same programming software. You need a cable with 1/8" (3.5mm) TRS (tip/ring/sleeve) stereo plugs on both ends plugged into the PC/IF jacks on both scanners. Make sure you do Clone Send on the master scanner where you want to keep the programming.