POS Connector, just the price of one dish of pizza, operates with Plug&Play on existing POS system without software update. POS Connector also operates on credit card terminal and works out for cash only stores. And it can lower the commission fee by using bank-to-bank payment network instead of expensive credit card network. Also, the POS Connector provides consumers with an opportunity to securely store and utilize offline transaction data by transferring receipt data with JSON format to the smartphone. Moreover, using POS Connector as Bluetooth beacon, you can offer a variety of services for your in-store needs such as reservation, waiting, order, coupon, delivery etc., through mobile.