The Active Trax Audio Player eco-gadget is an amplifier and FM radio that can charge up using solar power, hand power (via the handle) and good ol’ AC mains power. Using a 3.5mm audio jack, you can play your iPod or any other MP3 music player that has a standard headphone socket.
A single charge of the battery lasts for 7 hours, although it’s not clear how long you need to use hand power or the solar panel to achieve a full charge. It’s great for camping and being outdoors, a great way to break the silence if you’re feeling a little bored out in the open. What I really like is that the amplifier comes with its own case, perfect if you want to make sure it doesn’t get damaged during your travels.
Source: ChipTrick