Fone-Case Acer Allegro Mini Capsule Rechargable Loud Speaker 3.5mm Jack To Jack Input (Black) Compatible with a 3.5 mm plug that suit for most electronic devices like MP3, MP4, Music Phones, iPod, Mini Disc Players, Portable CD Players, Notebook PC etc. 360 degree sound field. LED power indicator for power on and charging. Pocket size speaker, compact but no discount in sound quality. Rechargeable lithium battery which last up to 8 hours, can be charged with the usb cable.