SonicGuard provides clean, safe, easy-to-use, cost-effective protection for humans & pets from ticks and fleas. SonicGuard works by emitting a series of ultrasound pulses that are harmless to both humans and pets but disturb ticks and fleas, repelling them and keeping them away. Your SonicGuard is an effective prevention, but still monitor high infestation areas, and if needed, also use a non-chemical tick & flea spray. Battery lasts up to 12 months providing season long protection! SonicGuard technology underwent rigorous testing and was proven effective by a clinical study at the School of Veterinary Medical Sciences at the University of Camerino, Italy. Features Clean, safe, cost-effective protection from ticks and fleas is easy-to-use Ultrasonic pulses disturb ticks and fleas, repelling them from pets Small, water-resistant device attaches to pet's collar; for all size pets Season-long protection - battery lasts up to 12 months Operating range is about 4.92 feet