Seems like a nice wee radio for the bathroom or garden. It can be charged by the solar panel / usb or windup. The solar should keep it topped up for the 20 mins I use it per day.
Here is the data from amazon where it is £4.50 dearer
* Powerplus Cheetah Dynamo & Solar AM/FM Radio
* Enjoy music and information anywhere, anytime!
* No more dead batteries with the Powerplus Cheetah Dynamo & Solar radio
* Wind up, Solar,USB rechargeable or mains socket
* Small and lightweight, easy to carry
* Ideal for camping, boating, gardening etc
* The most ecological radio!
* Robust design; with rubber coating Technical details:
* 1 minute wind up gives 20 minutes radio time
* 5 hours sunlight gives 30 minutes radio time
* Time to fully charge-20/30 hours of sunlight
* Fully charged by USB/AC - 8 hours
* Radio play time fully charged - 7 hours
* Battery- 300 mAH, 2.4V Ni-MH
* Weight - 205 gms
* Dimensions-130 x 70 x 38mm
All the best,