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The GPRS modem is a good tool which can conduct mobile data transimission by gprs xxxxx gprs modem with usb interface can mainly used in outdoors and the events that wire link to internet is unavailable.You can also access to network event to galloping xxxxx only charges you when you transimit data. * File Transmission * Receive/Send E-mail. * Receive and Send Short Message(SMS). * Receive and Send Fax. Technical Index * Chipset: CLASS4 GPRS module * Terminal Type: Class B,Type II * Working Frequency: Quad-Band GSM **0/**0/***0/***0 MHz * Transmission Power: Class 4(2W EGSM**0/**0MHz) Class 1(1W GSM***0/PCS***0MHz) * Multislot class : Multislot class *0(Send/Recieve slot collocation:2/4) * Transmission Operation: Data, GPRS, SMS Data Specialty * Data Transfer Rate:Downlink *5.6Kbps(maximum) * Coding Scheme:supports all coding schemes (1, 2, 3 and 4) * Resource Configuration: Fixed, Dynamic, Extend * Data Format: V.*2bis , RFC***4 * LED Indicator: On Line * Antenna: External Removable * Terminal Interface: USB 2.0 * SIM Card: 3V, 6tap bayonet socket inner connect * Power Supply: 5Vdc * Current (Typical) * Active Mode:**0mA, ave.(2W, Multislot Class *0) * Idle Mode:*0mA * Off Mode:1mA * Reset Mode: Software Mode or Hardware Mode Temperature Range * Operating Temperature: **0 Celsius degree—**5 Celsius degree * Deposited Temperature: **0 Celsius degree—**5 Celsius degree