Amazon.com: OSTENT GSM/GPRS Dual-Band 900/1800MHz 2G Modem with Siemens MC52I Module USB Port Interface at Commands Bulk SMS MMS TCP/IP : Electronics
8/16/32/64-PORTS MODEM POOL, buy GSM/GPRS MC52i 8 Ports Modem Pool Dual-band 900/1900MHz gsm modem for vending machine on China Suppliers Mobile - 141189914
Professional Wireless Usb Mc52i Gsm Gprs Modem - Buy Gsm Modem,Cinterion Mc52i Modem,Wireless Gsm Dual Band Modem Product on Alibaba.com