Нужна : make your own advertisement for a gadget think about name,price,what it can do

1. The name of our invention is water-player.
2. The product is used for listening music under water.
3. To use the product, you must switch on the button "to play" and enjoy music. 
4. Our product will appeal to everybody who likes music and who wants to listen to music during swimming in the river or in the sea.
5. You'll buy this invention because it's unique and easy to use.
6. Our product costs about 300$.