Jeppesen Skybound G2 USB Adapter Compact and portable USB reader/writer Compatible with Garmin 150/150XL, 155/155XL, 165, GNS 250/250XL, 255, GNC 300/300XL, GNS 400 & 500 series, and GNS 400&500 WAAS series Windows 7.0, XP, Vista compatible, both 32-bit and 64-bit installations are supported Mac OS X v10.6 or later. 64-bit Intel processors only USB 1.0, 1.1 and 2.0 compatible