Apple iPod shuffle 4GB, Green, iPod shuffle. Player media type: flash-media, Total storage capacity: 4 GB. Audio formats supported: 3, 4), AAC, AIFF, Apple Lossless, Audible (formats 2, MP3 (16 - 320 Kbps), MP3 VBR, WAV. Headphone connectivity: 3.5 mm, Headphone frequency: 20 - 20000 Hz. Continuous audio playback time: 10 h, Battery technology: Lithium Polymer (LiPo), Battery recharge time: 3 h. Weight: 10.7 g, Depth: 7.8 mm, Height: 45.2 mm