Review on COSTIN Multifunctional Compass: High Accuracy with Map Measurer, Distance Calculator & More - Ideal for Outdoor Activities - Matte Black Finish by Dave Giri

Excellent compass. If the GPS goes out along with the power grid and society collapses, you can still find places with something like that. This is a quality compass and I am happy with this purchase. As a veteran, I hate most "military" BS, especially for phone cases, but in this case it might be worth using "military" in the title. Robust construction.