Qualcomm UN2420 3G wwan Card Gobi 2000 HP DM1 DM3 G2 G3 HSPA/WCDMA 800/850/900/1900/2100 Mhz - Power Class 3 GSM/GPRS 850/900 Mhz - Power Class 4GSM/GPRS 1800/1900 Mhz - Power Class 1 EDGE 850/900/1800/1900 Mhz - Power Class E2 Note: this wireless card could only work on HP version laptop Support system : Microsoft Windows 7 Microsoft Windows 7 (64-bit) Microsoft Windows Vista Microsoft Windows Vista (64-bit) Microsoft Windows XP