Duel Adapter ExpressCard 34 to PCMCIA PC Card and CardBus Reader-Writer for Panasonic P2 card 3G/ATA/cellular/aircard/wireless LAN/modem cards. NOTE: Please check the compatible list before purchase. NOT for Mac OS 10.6 Snow Leopard or WIN 7 Panasonic P2 card is not included Fits in 34mm or 54mm ExpressCard slots Windows XP/VISTA and Mac OS X v.10.4 or later compatible Works with standard 32-Bit CardBus cards and 16-Bit PCMCIA cards ***Please check the Unsupported Systems List before purchasing. NOT for Mac OS 10.6 Snow Leopard