Designed to look like an alarm clock, the Deluxe Outdoor Ultrasonic Bark Stopper can be hung on a tree, anywhere in the house or in your yard, it can be hung, placed on a table or left. anywhere else. When waking up Deluxe Outdoor Ultrasonic Bark Control detects excessive barking, microphone detects barking and activates component. At this time, the product will emit a safe high-pitched ultrasonic sound, which can be heard by dogs but not by pets. humans. The dog stops barking when stimulated by sound. Because the ultrasound may make the dog uncomfortable, the dog will stop barking. Designed for outdoor use, the Outdoor Ultrasonic Bark Stopper is durable and waterproof. There are 3 levels of sensitivity (effective range from 5.10 to 15 meters), and a test level. Requires a 9 volt battery (not included), with an average autonomy of 2 months. The Outdoor Ultrasonic Bark Stopper has a power indicator that can be set to "Off" when you are away to protect the battery. Limited life cycle, two-year warranty. Excessive dog barking can have a negative impact on you and your neighbors. The outdoor ultrasonic bark suppressors effectively prevent dogs from barking and do not require Receiver Collar. Safe and effective for dogs of all breeds and sizes. Features: *Use ultrasound to stop dogs from barking * Effective range 15 meters *4 operating levels *Durable and waterproof * The two-color LED indicates whether the battery is sufficient * 9v battery - (battery not included) *Can effectively prevent your dog from barking * Can effectively prevent your neighbor's dog from barking * Can prevent the dog from barking at a certain time *Train the puppy not to bark * Stop dogs barking while camping *Sound Sensitive Microphone: Triggers ultrasonic sound. * Switch with 4 operating levels: *OFF - to save battery *Test - used to check microphone and speaker functionality