Design: Drop Shape Design of is very comfortable, fits all sizes and easy to check Material: Stainless steel click grenade for dog training will not be deformed under ten thousand pressure, durable and not rusty Safety: Our dog training sound does not contain electricity and does not cause harm to dogs and electric shock Features: Just press the button, training clicks make a clear sound Function: Can train dogs for home training, basic obedience, tricks, and can also correct the bad behavior