The rounded design means the i-Clicker is more comfortable for trainers and the big yellow button allows you to Click from a whole range of positions - from the palm of you hand, in your mouth, you can leave it in the pocket of you Treat Pouch and click from there, or you can even drop it and it will land ready to be clicked with your foot. The i-Clicker gives a softer sounding click and you don't need to press very hard to Click, which will be much appreciated by arthritis sufferers. The button clicking action is also perfect for people whi have difficulty getting their thumb into a Standard Clicker. This is a great addition to the tool box of positive trainers. Available in Black/Yellow only.