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 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 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 How to use: 1. Testing upon receipt of product: A white 3 pin connector is designed on the board and you can connect it to PC using WAFER RS232USB adapter. 2. You can use PC RS232 tools to send commands and receive data for testing. Please read the instructions for detailed use.