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The GPRS Modem is a good tool which can conduct mobile data transmission by GSM/GPRS network. The GPRS  modem with USB interface can be mainly used outdoors or used in the event that wire link to internet is unavailable. You can also access to network even on a galloping train. It only charges you when you transmit data.
 
Main Features:
Browse Internet with high speed.
* 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 850/900/1800/1900 MHz
* Transmission Power: Class 4(2W EGSM850/900MHz)
                    Class 1(1W GSM1800/PCS1900MHz)
* Multislot class : Multislot class 10(Send/Recieve slot collocation:2/4)
* Transmission Operation: Data, GPRS,  SMS
Data Specialty
* Data Transfer Rate:Downlink 85.6Kbps(maximum)
* Coding Scheme:supports all coding schemes (1, 2, 3 and 4)
* Resource Configuration: Fixed, Dynamic, Extend
* Data Format: V.42bis , RFC1144
* 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:550mA, ave.(2W, Multislot Class 10)
* Idle Mode:50mA
* Off Mode:1mA 
* Reset Mode: Software Mode or Hardware Mode
Temperature Range
* Operating Temperature: -10 Celsius degree—+55 Celsius degree
* Deposited Temperature: -40 Celsius degree—+75 Celsius degree