Integrated microSD slot, connectivity software, LED status indicators, built-in GPS GSM/GPRS 850/900/1800/1900 MHz Certified for 7.2 Mbps on 3G networks HSPA ( 850 / 1900/ 2100 MHz ) Up to 7.2 Mbps on 3G networks where HSPA 7.2 is deployed. ATT Communication Manager 7.1 (ACM) microSD card slot Compatible with most laptops with wireless capability Support microSD cards up to 16GB (not included) for easy storing or transferring of media.Rotating USB connector Makes it easy to plug into any USB port. System requirements: Windows 7, Vista, XP, Mac OS v10.4 or later compatible * USB Port* Internet explorer 5.5 or later 300 MHz processor / 256 RAM 100MB available hard disk space