Anti Barking Device, Dog Barking Control Devices Up to 50 Ft Range Dog Training Behavior Aids, 4 Modes Ultrasonic Dog Barking Deterrent Devices, Indoor Anti Barking Device Safe for Human Dogs Features: 1. Dog anti barking device uses ultrasonic to stop dogs from barking 2. Birdhouses are designed to decorate gardens and houses are a sight to behold 3. Anti barking device outdoor durable and weatherproof. 4. Safe and humane method for bark control, can be used on almost breeds and sizes of dogs Test outdoor barking control device 1. Set the dog barking control device mode switch to test. 2. Hold the indoor anti barking device with the indicator light facing you. The ultrasonic antibark device 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: 6.73 x 5.31 x 5.31 inches Weight:11.7 ounces Power: 1 x 9V battery (not included) Modes: T Verify the 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. The barking will not stop at first, so please allow up to 2 weeks for training. Package includes: 1 x Anti Barking Device 1 x User Manual 1 x lanyard