Specifications:

• AUTOMATIC ANTI BARKING DEVICE:Dog bark deterrent devices has an automatic bark detection function,when excessive barking is recognized the dog deterrent devices automatically emits an ultrasonic sound to stop the barking
• 3 MODES DOG BARK DETERRENT DEVICES:The anti barking device is suitable for dogs of different sizes and has three modes.Mode 1:15-30 KHZ naughty or large dog. Mode 2:20 KHZ for docile dogs. Mode 3:30 KHZ for small dogs
• SAFE DOG BARKING SILENCER:The ultrasonic barking deterrent emits ultrasonic waves only when the dog barks and is specially designed according to the dog's hearing range.Humans can't hear them, they have no effect on humans
• DURABLE SONIC BARK CONTROL DEVICE:This dog barking silencer has an IPX4 waterproof.Don't worry about rain or any other bad weather.Perfect for dog houses,tables,fences or trees,etc

Anti Barking Device for Dogs, Rechargeable Dog Barking Silencer with 3 Modes Ultrasonic Barking Control Deterrent Devices Safe for Dogs