Comes in a pack of 5 with multiple colors including navy, white, black, sky blue and red with stretchy wrist strap.Colorful enclosure with ergonomic shape .Makes it look fresh and comfortable to grab and hold.Additional wrist band makes it easy to carry. 2.Full mechanical structure, no batteries required 3.Clicks are loud and clear, will catch their complete attention 4.Traning clicker is a good tool for training pets which are sound-sensitive like cats,dogs and even birds and horse.Training their behavior like sit, fetch, roll over, lie down etc. 5.Training your dogs with clickers is much safer than using a eletrical shock strap.It does no harm to your pets