Flesser&reg; Portable Mini Speaker Surround Sound Enhancer Build-in USB Rechargeable Battery Work With 3.5mm Audio Plug Special Designed for iPad 1 2 3 4 air Mini Retina iPhone 4/4S/5/5S/5C Samsung Galaxy Tab Note Google Surface Nexus Tablet Ebook Kindle Smart Phone etc (Black) Special design, can be absorbed on the border of tablet USB powered, plug and play Color: Black With a 3.5mm audio port, suit for many electronic devices such as cellphone, MP3, MP4, PC, notebook, tablet, etc. Rated Power: 4 * 3W