PC Interface to MDB Adapter Box Coin Acceptor Validator Simulator for Vending Machine black.Feature: 1. Cashless Payment: MDB interface module allows PC to be used as subordinate cashless payment device to an existing vending machine. 2. Vending Machine Use: PC to MDB adapter box is used for the existing vending machine, allowing the PC to work as a payment device. 3. Easy Connection: MDB RS232V5 adapter box can connecting any MDB vending device to a PC through a serial port, which is easy to us