Item Type: Vending Machine MDB Adapter Box Material: ABS Model: MDB-RS232V5 Purpose:Connecting Vending Machine and PC Through MDB Adapter Box Package List 1 x MDB Adapter Box 1 x USB Cable 1 x RS232 USB Adapter 1 x Cable 4 x Screw kit 1 x Instruction 1Cashless Payment: MDB interface module allows PC to be used as subordinate cashless payment device to an existing vending machine. 2Vending Machine Use: PC to MDB adapter box is used for the existing vending machine, allowing the PC to work as a payment device. 3Easy Connection: MDB RS232V5 adapter box can connecting any MDB vending device to a PC through a serial port, which is easy to use. 4Convenient Use: Vending machine adapter allows you can send a simple list of commands and then connect with the machine to add credits. 5Portable Size: PC interface to MDB adapter box is compact, small in size and light in weight, portable and does not occupy too much space.