The Pro-Training Clicker from Starmark is a proven favorite amongst dog trainers. Comfortable and easy with a raised button helping to prevent missed clicks. Stainless steel internals will not rust.
Clickers have become more and more popular for modern trainers delivering and distinct and consistent signal to mark a desired behavior. When a clicker has been properly "loaded" animals understand precisely which action earned the click and reward helping them to learn new behaviors quickly and easily.