Technical index: 1) terminal type: mini usb　, 2) working frequency: 900 /1,800 /1,900 mhz, 3) transmission power, a) class 4 (2w egsm850 /900mhz), b) class 1 (1w dcs1,800 /pcs 1,900 mhz), 4) multislot class, a) edge multislot class 10 236.8kbps, b) gprs multislot class 10 53.6kbps, 5) transmission operation: data, gprs, edge, sms, 6) data transfer rate: more than 384.6kbps in maximum ( up link 236.8k, down link \n118.4k), 7) antenna: external removable, 8) terminal interface: mini usb　, 9) power supply: 3.3 vdc, 10) size:77 (l) x54.1 (w)x4.9 (h).\n