SPC Pro Training system Speed the learning up to 50% by marking the precise moment good behavior occurs with our SPC Pro-Training Clicker. Features: Includes a free step-by-step training guide Ergonomic design fits comfortably in your hand A scientific method of training safely and easily Made with stainless steel and wont rust Comfortable and responsive ergonomic design, easy to hold and press Raised button prevents missed clicks Quality And Performance Driven Products For Your Pet Easily attaches to keychain or lanyard (not included) Size: 2.5" x 1.5" x 1"