I bought my dad this one and he really likes it and easy to use.....got it as a lighning deal for $35
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1

I use this one and really like it. Pretty much the same as the one above but a wide viewing angle.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1