3G USB HSDPA MODEM 1DL 7.2Mbps, 2HSDPA/UMTS 2100MHz,GSM900/1800/1900 MHz. 3SUPPORT VOICE CALL 4SUPPORT MAC OS 3G modem HSDPA usb modem ... support UMTS2100Mhz and quad-band GSM HSDPA Modem specification:Qualcomm MSM 6280Supporting protocol: HSDPA/UMTS/EDGE/ ... support Allwinner, VIA, Rockchip, Andriod MID 3G modem HSDPA usb modem support UMTS2100Mhz and quad-band GSM