Sprint aircard 595U NO contract Transfer wireless data at max speeds of 3.1 Mbs downlink and 1.8 Mbps uplink, on the latest EV-DO Rev A networks High performance internal antenna for measurable improvements in data speed, signal acquisition and retention Dual-band, 800 and 1900 MHz support with Receive diversity Built-in GPS antenna design to support mobile operator Location Based Services for most accurate and fastest time to signal fix Supported OS: Windows Vista, XP, 2000, and Mac OS X