Specification: Driver Units.2x1.5" (anti-magnetic),8 ohms,2W speaker Amplifier impedence: 8ohms SNR: >38dB Output Power:2W*2 300mAh Frequency Response:120HZ-20KHZ Input:3.5mm Stereo Headphone Jack,Direct Insert. Power Supply: 3.7V Rechargeable Lithium Battery.(up to 7 hours working time) Dimension:13 (L) *42 ( W) *30 ( H) mm Weight:97.3g Features: Cosmetically designed to match the Ipod. Rotate to reveal stereo speaker Fold/unfold easily,easy to carry. Full range,bass-reflex system. Green LED power light Play, charge &sync iPOD SHUFFLE. Over charge Protection Lanyard neck strap. USB to 3.5mm stereo cable( sync with iTUNES,charge speaker & iPOD SHUFFLE) Accessories: USB to 3.5mm stereo cable( sync with itunes,charge speaker & iPOD SHUFFLE) Lanyard neck strap. Colour Available: Red, Green,Blue,Purpleand Siver Packing: each set in camera pack,6 pcs/CNT OR at the buyers'option