Light House Free Blocker House Red For Dogs, Cats, and Small Animals Features: This is a device that releases ultrasonic waves of over 20,000 Hz without using any chemicals to remove fleas and mites from your pet. It will last for approximately 10 months. Not only is it harmless to your pet but also the surrounding environment of your owner. Safe to use for sickness and post-illness, pregnancy, old dogs, puppies, kittens, and small animals. Quantity: 1 piece; Size (W x D x H): Approx. 1.4 x 2.4 x 0.4 inches (3.5 x 6 x 1 cm); Material: ABS resin, lithium battery; Country of Origin: Italy; How to use: Pull out the insulation sheet to start working. Set it in your favorite location such as your pet. Effective in a range of 8.9 ft (2.5 m) radius.