High quality cardboard mask "Britney Spears" [UPGRADED NEW DESIGN]: Fomei Lovely Silence Dog Training Control Repeller has been upgraded for 2018 and is more effective than previous models. [ HIGH FUNCTION DOG BARK DETERRENT]: Fomei Dog Ultrasonic Bark Controller is effective range 50 feet. And there are 3 range levels and a test mode,you can use the test mode to verify the microphone and speaker are working properly.The two color LED indicator show good or low battery. [VERSATILE & WATERPROOF]: Fomei ultrasonic dog bark control devices could not only effectively block the barking of your dog and your neighbor's dog, but can also trains puppies to avoid barking. Outdoor ultrasonic barking devices is made of ABS plastic, durable&waterproof. So you don't worry about the rainy day. [100% SAFE & NOISELESS]: All of our product have the certification of CE, You can be assured of the quality of our products. The ultrasonic waves that Fomei bark repeller sends are far beyond the hearing range of human-beings. Dog bark controller will deter barking without any harm. Enjoy a peaceful & quite time without any concerns for barking. [SATISFACTION GAURANTEED]: Fomei always provides the premium quality products to our consumers. If for any reason the Fomei Pet Supply ultrasonic dog bark controller does not work for you, email us and you will get 100% MONEY BACK from us. No questions asked.