For more than 30 years, we have been specializing in manufacturing a variety of ultrasonic pest repeller and bird repeller and have enjoyed an excellent reputation. Our ultrasonic pest repeller and mole repeller are products designed to keep certain animals away from objects, areas, people, plants, or other animals. No matter you are looking for manufacturer for new products or new manufacturer for current products, we are willing to provide samples for you to test. If you require more information on a particular product, please don't hesitate to contact with us. Leaven @ Altrason.com