Come and see our amazing products.There is a whistle on the clicker, it has been updated than other clickers. This dog training clicker helps train dog basic obedience and tricks instead of dog bark shock collar.You can use it to train your pet how to shake, roll over, fetch, or to do more tricks. You can use the clicker to train your pets basic obedience, small trick, and correct the bad behavior. Custom LOGO is available. 2.9375" L x 1.375" W Pls confirm further with us if any query about packing info, inventory status and time schedule.