The magnetic coupling makes it posible to easily position the ring without getting your hands wet, and the jointed connection assembly makes it simple to adjust the distance from the aquarium wall. Another feature, the Two Little Fishies button pops into the mushroom head of the feeder. It retains any ring-shaped foods, such as the Grazer from New Era. The magnetic coupling lets you position or retrieve MagFeeder easily, and without getting your hands wet.