Ultrasonic anti-barking devices automatically detect barking from as far away as 50 feet. The barking control device automatically emits high-pitched sounds that only dogs can hear. Once the dog stops barking, the ultrasonic bark control automatically stops emitting ultrasonic sounds.

• Ultrasonic frequencies are harmless to pets and completely inaudible to the human ear, so you can use this device safely.
• Can be hung on a tree, indoor, outdoor wall or fence post to stop any dogs barking(within range). When the luxury outdoor ultrasonic barking alarm clock detects excessive barking, the microphone will respond to barking and activation parts.
• With built-in rechargeable battery inside, which can be used continuously for one month. Waterproof shape so you can install it anywhere with screw mounting. 4 Sensitivity and Frequency adjustable levels, so you can adjust any level you want.