Product Details  auot-run,no cd required tri-band:900/1800/1900MHz up to 460.8Kbps  Auto-RunThere is no need CD Drivers.It is plug&play.Very Convinient.  1. Supports EDGE/GPRS Tri-band:900/1800/1900Mhz. 2. EDGE multi-slot class 12 (up to 4TX, 4RX, 5 total), up to 460.8kbps 3. External removable antenna. 4. Operating System: Windows2000/XP/Vista 5. Control via AT-Command (GSM 07.07, 07.05 and enhanced AT Commands) 6. Interface: USB Port 7. SIM application toolkit 8. Supply voltage range 5V 9. Low power consumption 10.Voice communications Mode Single Network Type EDGE 900/1800/1900MHZ Interface Type USB SIM Card Base Eject Antenna Inside Antenna Working Voltage 5V Data Transmission Rate 460.8Kbps Weight About 30g Size (MM) 80*35*10mm Others Calling, SMS, Phonebook, etc Supported System WINDOWS2000/XP/VISTA, etc/ compatible CPU of two cores Technical Index Chipset: qualcomm MSM5209 Terminal Type: Class A Working Frequency: 900/1800/1900 MHz Transmission Power: Class 4(2W EGSM900MHz) Class 1(1W GSM1800/PCS1900MHz) Multislot class : EDGE Multislot class 10 GPRS Multislot class 12 Transmission Operation: Data, GPRS, EDGE, SMS Data Specialty Data Transfer Rate: More than 460.8Kbps in 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: 5V DC 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+55 Storage Temperature: -40+75  edge modem hot seller frequency:900/1800/1900mhz speed rate:460.8kbps chipset:Qualcomm 6209 high quality and low cost