Features: 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 use. 4.Convenient Use: Vending machine adapter allows you can send a simple list of commands and then connect with the machine to add credits. 5.Portable Size: PC interface to MDB adapter box is compact, small in size and light in weight, portable and does not occupy too much space. Specification: Item Type: Vending Machine MDB Adapter Box_x000D_ Material: ABS_x000D_ Model: MDB-RS232V5_x000D_ Purpose:Connecting Vending Machine and PC Through MDB Adapter Box PackageList: 1 x MDB Adapter Box 1 x USB Cable 1 x RS232 USB Adapter 1 x Cable 4 x Screw kit 1 x Instruction