Webpos Mobile POS systems generally allow you to take payments on a mobile device and accept payments from customers Mobile.Mobile & tablet or dedicated wireless device that performs the functions of a cash register or electronic point-of-sale terminal wirelessly.A user can then download a POS app and connect the reader to their mobile device.A retail point of sale system typically includes a cash register (which in recent times comprises a computer, monitor, cash drawer, receipt printer, customer display and a barcode scanner) and the majority of retail POS systems also include a debit/credit card reader.A POS system is important because it gathers all your data on sales, inventory, and customers. With this information, you can calculate and run marketing campaigns that encourage customers to come to your store while maintaining your bottom line.