Pet Parade's Ultrasonic Tick & Flea Repeller is the non-chemical, odorless repeller emits a high frequency sound designed to protect your pets and their sleeping area from fleas and ticks from up to 6 feet away. The repeller can easily connect to your pet's collar, and its small and lightweight design provides a discreet fit. The Ultrasonic Tick & Flea Repeller is powered by the included CR2032 battery.