... STK, USSD gprs handheld pos :Key Words: airtime virtual top-up, gprs payment POS terminal, wireless handheld POS with GPRS and ... POS hardware portable POS, point of sale system, over-the-air top-up, Wireless Restaurant/hotel GPRS/GSM Printer, GPRS SMS printer ... factory have strong engieers team, GPRS SMS Printer Helps Print the Receipt Remotely and Automatically, wireless protable GPRS POS with printer ...