Stores up to 1,000 tracks.Up to 12 hours audio playback.Rechargeable via AC/DC adaptor.Rechargeable via USB port.Size (H)2.3, (W)4.7, (D)1.3cm.2.0 USB port. Portable solid state.2GB.MP3/WMA compatible.Repeat, shuffle function.FM tuner.5 station presets.USB cable supplied.Minimum PC specification: Windows 2000/XP/Vista.In ear headphones (supplied).Built-in battery.Weight 21g.