Pendulum Sights are very popular for hunting out of a treestand because they help to take alot of the guess work out of the distance that the animal is at from as close as 10 yards out of the tree up to 30-35 yards or more depending on the model/speed of bow setup. Pendulum sights do require to be shot in on the ground at a set distance for them to properly work out of a treestand for your hunting setup. The Truglo Pendulum Sight is our most popular selling Pendulum Sight.