... SMS, STK, USSD gprs handheld pos :Key Words: airtime virtual top-up, gprs payment POS terminal, wireless handheld POS with GPRS ... hardware portable POS, point of sale system, over-the-air top-up, Wireless Restaurant/hotel GPRS/GSM Printer, GPRS SMS ... for airtime topup, Small & Standalone Device SMS Printer for Delivery Services, 2012 China manufacturer gprs pos terminal, Originally Designed GSM GPRS ...