There's already a product that does this and it's about $10-20 cheaper than their predicted price. It's called the nio and I saw it on Amazon. It has a varying distance and software to control it automatically.
I think the idea is great and as long as it works, it'll definitely be worth it considering smartphone handsets now cost about $400-800 to buy on their own.
For those looking for a device strictly for reading, the new Kobo is a nice little option. It's small enough to slip into a pocket, can do more with a PDF than the competition, and at $129, it's $10 cheaper than both the Nook and Kindle WiFi.
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There's already a product that does this and it's about $10-20 cheaper than their predicted price. It's called the nio and I saw it on Amazon. It has a varying distance and software to control it automatically.
I think the idea is great and as long as it works, it'll definitely be worth it considering smartphone handsets now cost about $400-800 to buy on their own.