EXPANDABLE MEMORY UP TO 1GB! Designed with the athlete in mind, this compact Rio Cali Sport MP3 player provides rugged durability and hours of skip-free quality music. The Rio Cali Sport lets you store and play MP3 and WMA digital music files with 128 MB of built-in memory, or listen to your favorite radio station with the integrated FM Tuner. The Rio Cali Sport MP3 player is small and perfect for workouts, jogging, the beach, the lake, fishing and more since it won't get in your way. The Rio Cali Sport MP3 player has 128 MB of internal memory and holds 30 or more songs, expandable up to 1GB for over 500 songs! USB 1.1 connects to almost any computer Transfer content between multiple PC's Simple menus, thoughtful controls and a clear display make navigation easy. 5-band adjustable equalizer with pre-sets is featured for a customized listening experience. Features include: 128MB of internal memory Secure Digital card MMC™ expansion slot for up to 1GB of additional memory 5-band adjustable equalizer with pre-sets 18 hours of continuous playback with one "AAA" battery Integrated FM Tuner Digital Clock and Stopwatch USB interface Compatible with Windows 98 SE/2000/Me/XP/Mac OS X Accessories include: Carrying Case with Armband Sport Clip Stereo Earphones USB cable 1 "AAA" Energizer Battery Installation CD (software) Quick Start Guide 1 Year Warranty Model No: CALI 128 Weight: 2.0 Lbs.