... SMS, STK, USSD gprs handheld pos :Key Words: airtime virtual top-up, gprs payment POS terminal, wireless handheld POS with GPRS ... portable POS, point of sale system, over-the-air top-up, Wireless Restaurant/hotel GPRS/GSM Printer, GPRS SMS ... , CE and CCC certifications, RoHS etc.OEM / ODMOur product ranges are also covering:Wireless PBXIP-PBXAir-charging systemSchool-family intelligent networkBilling ...