The iTour 20 speaker measures a mere 50Wx50Lx35H(mm) but packs a punch like no other. Taking your music to the next level with amazing sound quality, patented vacume base technology and convenince of no other. This is truly the BEST portable speaker out there.Easily fitting in your pocket just pull out the iTour 20 and connect it to your favorite electronic device and listen as you blow your family & friends away with this amazing little speaker.All speakers have built in iON lithium rechargable batteries so you never need to buy batteries. Listen for 5-8 hours and recharge in under an hour! Connect to your favorite music devices such as: Stereos, Mp3 Players, Ipods, iPad, Phones, Game Systems, TV"s, Computers, Laptops, Electric Guitars, and more!The iTour 20 has a True Link-Link design. Link as many up as you want and watch as your sound explodes! You can even link them up to OTHER portable speakers!