Anti Barking Device, Dog Barking Control Devices Up to 50 Ft Range Dog Training & Behavior Aids, 2 in 1 Ultrasonic Dog Barking Deterrent Devices, Dog Silencer Anti Barking Device Safe for Humans & Dog Features: 1. Dog anti barking device uses ultrasonic to stop dogs from barking 2. Our stop barking dog devices are designed in the shape of a birdhouse to decorate your garden or house 3. Anti barking device outdoors durable and weatherproof 4. Safe and humane for bark box can be used on all breeds and sizes of dogs Test outdoor barking control devices 1. Set the dog barking control devices mode switch to test 2. Hold the indoor anti barking device with the indicator light facing you. The ultrasonic dog bark deterrent should maintain arm's length with your ears. 3. In order to trigger the work of the pet gentle anti barking device, say "Woof" loudly into the microphone. Specification: Size: 5.31 x 5.03 x 5.78 inches Weight: 0.73 lb Power: 1 x 9V battery (not included) 4 Modes Bark Box: T - Verify the anti barking device microphone and speaker are functional 1 - Low Range(Up to 15 feet) 2 - Medium Range(Up to 30 feet) 3 - High Range(Up to 50 feet) Notes: 1. The dog barking deterrent devices will not work on deaf or hearing-impaired dogs 2. Humans cannot hear ultrasonic sounds. however, precautions should be taken when preparing the outdoor bark control for use It's best to keep the dog barking control device one hand's length away from the ear. 3. The adaptability of each dog is different. When the bark box emits ultrasound barking will not stop at first, so please allow up to 2 weeks for training. Package includes: 1 x Anti Barking Control Device 1 x User Manual 1 x Lanyard