The Digimaster 3 site's about page identifies the manufacturer as Nanning Yanhua Electronics Co., Ltd., established in 1999 in the Nanning High-tech Zone, and says that company is the manufacturer and exclusive distributor. It describes automotive electronic and testing equipment. Awards named on that page include Digimaster in 2006 and Digimaster II in 2006. The about page does not give a technical specification for Digimaster 3.
Tool retailers list Yanhua Digimaster 3 as an odometer tool with adapters and online updates. Treat coverage, token limits and adapter sets as seller claims until they are checked on a current Yanhua document. Copied Digimaster hardware is advertised widely; confirm the seller against Yanhua's own channel.