The PSR-800 was manufactured by GRE America in China. The first scanner model to be Micro SD based as well as bring the Radioreference Database (RRDB) and EZScan on said card. After an initial few hiccups, the firmware, was reworked to bring, the new at the time, very first APCO’s P25 Phase II to scanner market, in the death-throws of GRECOM America, as well as the companies last update. Shortly afterwards, all intellectual property for this product was acquired by The Whistler Group. This model became Whistler’s genesis model for which they rebranded and released, the additional badge-engineered models, as their own model WS1080, also manufacturing for RadioShack the RS Pro-668 branded equivalent. Three additional models with direct ancestry, the RS Pro-18 lacking certain features, the WS1095 with additional numeric and function keys on the keypad and their newest overhauled version of a handheld, the TRX-1 in the same form factor.