Green Power has introduced the GP 400n, a unique sliding speaker for your iPod Touch or Nano. Unlike the iPhone, neither of these two MP3 player models has an included speaker, so a small external speaker is a must if you want to listen to music without headphones while still remaining mobile and portable.
There’s a pair of 1.5w powered speakers which run of a 600mAh built in rechargeable battery which is good for 12 hours. Your iPod connects via the dock connector and the GP 400n is powered via USB. So you’re not going to be enough sound to drown out the DJ at your local pub, this should be sufficient enough for a hotel room or other small area where you need some amplified music. No prices listed.