Sandisk Sansa E-Series MP3 Player 4GB MP3 Player

Interface: USB 2.0
Display : 1.8 TFT
System requirements: Windows Media Player 10+CD-ROM drive
Compatible Operating Systems: Windows XP
Battery technology: Lithium-Ion
Battery life: 20 hour
Storage media: Storage capacity 4 GB
Player media type: Flash memory
Compatible memory cards: micro SD