WF-MDB can connect to the MDB type coin acceptor, bill acceptor, Pulse type coin acceptor, bill acceptor and RS232 type credit card reader and so on. That is already integrated with two times inside with LED display board, that can control two massage chair at the same time.
It also has the massage chair feedback signal input to keep the control process more comfortable.
Also it have the LED display board on the main board, that can check the history value and the every day income.