With the SanDisk Sansa Fuze MP3 player you can listen, watch and play all day with 24 hours of battery life and room for up to 1000 songs* (4GB Version) Sansa Fuze from SanDisk has massive on-board storage but also has the added versatility of a micro SD / micro SDHC memory expansion slot. Watch your favourite video clips on the Sansa Fuze's 1.9 colour screen. Listen to FM radio with 40 pre-set stations, play with the built in voice recorder, and share your photos wherever you go. Incredible battery life in a 0.3 thin device, the Sansa Fuze marks the next wave of MP3 music & video players. - Product Dimensions: 3.1 x 1.9 x 0.3 in. (H x W x D) - Product Weight: 2.1 oz - Screen Size: Bright 1.9 screen 220x176 colour TFT - Recorder: Built-in microphone - Audio Books: Audible, Overdrive - File Support: MP3, WMA, secure WMA, WAV, Audible, MPEG4 System Requirements: Windows XP or Vista Mac OS 10.5 and above Windows Media Player 10 or 11 CD-ROM Drive USB 2.0 high power port Operating System: Windows XP or Vista, Linux and Mac OS (under MSC mode) Complete with:USB 2.0 Cable, Earphones & Quick Start Guide *Approximation based on 4-minute songs at 128 kbps MP3.