Handspring Visor Pro (Silver) Features 16 MB of memory and internal rechargeable battery Built-in address book, to-do list, memo pad, date book, advanced calculator, silent alarm, and world clock Use expansion slot to turn the Visor Pro into an MP3 player, modem, GPS receiver, and more with optional Springboard modules Runs Palm operating system works with thousands of Palm OS applications Visor Pro, USB HotSync cradle, 16 MB RAM, AC power adapter