1. The bird feeder is designed discreetly to protect you from barking dogs without attracting unwanted attention nearby. 2. Ultrasonic eliminates unwanted barking and weatherproofing is safe and effective for dogs of all sizes and breeds, except deaf or hard of hearing dogs; 9V battery operation - (battery not included). 3. Integrated microphone: The microphone integrated in the house has high sensitivity and can recognize the barking of dogs 50 meters away. Efficient ultrasound technology is then activated and peace is ensured with the help of frequencies that are inaudible to humans. 4. Multiple settings: The device can be adjusted to your personal needs and can be set to four different intensities. The bird feeder can be easily installed anywhere in your garden and is waterproof and weatherproof. 5. Easy to hang/install on trees, walls or fence posts to prevent your own dog or your neighbor's dog from barking; attractive and discreet birdhouse designs look great in your home or yard. Using ultrasound to stop dogs barking Effective range 50 feet 4 levels of operation Durable and waterproof Two-color indicator light shows whether the battery is sufficient Colour: Black