Soundshield by MAX& MOLLY is a modern, uncompromising protection for your dog against fleas and ticks. Soundshield uses ultrasonic technology 24/7 to keep ticks and fleas at bay, without the use of chemicals. It is a safe and non-invasive solution, ideal for sensitive animals or for owners who prefer repellent alternatives for protection. The device is easy to attach to the collar and works continuously, providing constant protection during walks or at home. With a waterproof design and replaceable battery, Soundshield is a practical and durable accessory for your furry friends daily protection. Benefits: 24/7 protection against ticks and fleas Proven effectiveness by the University of Camerino – It is WATERPROOF for up to 30 minutes. Easy to attach to the collar Soundshield™ is 100% chemical-free! This repellent device uses the latest advanced technology that emits intense ultrasonic waves over a 1.5m radius at high frequencies to consistently deter ticks and fleas. It is 100% safe and inaudible for both humans and pets. Tested and proven effective for up to eight months of continuous coverage. Easy On/Off. There is a small button on the front. Just below it says Press. It is very hard to press, so it wont be accidentally turned on or off by your dog. When it is turned on, there is a green light that flashes from time to time. When it is turned off or the batteries are low, it does not flash. Soundshield has an effective radius of 1.5 meters Because it is 100% chemical-free, Soundshield™ can be used on dogs of ALL ages, even puppies, older and sick dogs, or pregnant dogs. Please note that Soundshield™ is intended for use as a pest prevention and will not eliminate pests from an infested pet. Soundshield™ is designed for pets that live in homes with their people. It is not suitable for dogs that are already heavily infested with parasites or live in an environment where they are constantly exposed to a high population of ticks and fleas.