Here is my review for your product:

Pros:

• Very amazing idea to help blind people
• It is a simple idea, but it is great and clever
• Hard to fond similar product that can help blind people but not for entertainment
• It is meaningful, not only use it for gaming, but helping people

Cons:

• Nothing for this product I can found

My comment:
I love this very much. It can help people and it is very meaningful.

For this product, I like to mark it as
9/10

Good work on hunting, thank for bring us a good product

(Please noted that it is my personal opinion only)