Concept Ideas

These are my 5 specification points :-

• It has to be waterproof
• It to have a hook to hang it up
• It must not have too many buttons so it is easy to use in the car.
• It must be medium sized so that it can produce a good amount of sound but not be too big to move around
• It must be a shape that will not roll around in the car if it is not hung up

These are my 3 concept ideas.