This weighted puppy tail plug is a great way to know when your pup is happy. The end is weighted so with a simple shake the puppy tail will sway with excitement just like the wagging of a real tail! When your puppy deserves  a reward simply use the wireless remote to send a wave of stimulating vibration deep into them. Cycle through 5 different vibration modes to  tantalize tease and teach your puppy to come. The plug is designed to fit  comfortably inside while staying in place with a bulbous end and a contoured base designed to keep the tail upright while it is inside.