Check the listing for details. DKS Doorking 2351-010 PCB Door Access Control Gate Tracker Expansion Board. Condition: Used. Listed at 87.22 USD. This DKS Doorking 2351-010 PCB Gate Tracker Expansion Board is the ideal solution for your access control needs. With its RFID technology and keyless access system, you can easily monitor and control access to your facility. The board is designed to work seamlessly with your existing DKS equipment, making installation quick and easy.Make your facility more secure and efficient with this top-of-the-line gate tracker. Its durable construction and reliable performance ensure that your access control needs are met, without any need to worry about the condition of the equipment. Whether you're in the facility maintenance and safety industry or running a business, this RFID reader and writer is the perfect solution to streamline your access control system.