Hamiledyi Adjustable Pitch Dog Whistle, Dog Training Whistle UltraSonic Sound Ultra Sonic This training clicker is a communication tool between human beings and animals like dog (including police dog and seeing-eye dog) , cat, horse, pets. This Clicker training is a light exercise method for the common training behaviors like : house-trained, basic obedience, small trick, and correct the bad behavior. Scientific method of training your pet safely and easily. This button clicker 4pcs/pack with wrist strap, easy and convenient to carry and use in any position Nice loud click safe for sound sensitive pets and animals By pressing the button the clicker makes a distinct and recognizable sound designed to get your dogs attention and become a familiar indicator of a job well done. Package including:4*training clickers