Dog Flea Medicine

Riddex ultrasonic flea collar emits powerful ultrasonic pulses towards the ground that bounce back up to deter fleas, ticks and other harmful insects thathidein the grass while walking your pet. The collar is also infused with eucalyptuswhich is a natural pest repellent. Provides safe, effective pest control without the use chemicals or odors. Batteries included. Includes black silicone collar(21 1/2") Fits onto most collars. Plastic, metal, 2 3/4 x 1".