Check the listing for details. Lot Of 14 modus anti barking devices. Condition: New. Listed at 45.00 USD. Perfect item for resale! 14NEW modus anti barking devices. Original listing on amazon shows all the features. Original list price per item is $23.99 Features & details Dog Bark Control and Dog Training - Our ultrasonic anti bark device provides a safe and effective solution for dog training and bark control. The anti bark device can effectively train your dogs to stop unwanted behaviors such as barking, digging, eating unsafe food, fighting, etc. Suitable for All Size Dogs - The average human hearing frequency range is 20HZ~20KHZ, and the dog can hear a wider range from 15HZ to 120KHZ. MODUS ultrasonic bark control emits ultrasonic sound at 25KHZ, so the sound doesn’t affect humans, but can grab dogs’ attention. Convenient to Use Outdoor - MODUS ultrasonic barking dog deterrent just fits nicely in your hand and comes with an adjustable anti-static wrist strap. The control range of MODUS bark deterrent is 16.4ft. As we use ultrasonic technology, it works effectively on all sizes of dogs. Easy to Use - When you press & hold the button of the MODUS ultrasonic barking control device, it will emit an ultrasonic sound that can only be heard by dogs. The LED indicator lights up green when the device is working and emitting ultrasonic sound. Press the button for over 10 seconds, the device will be turned off automatically. The device is powered by 4 AAA batteries (Included). User’s Guidance - The ultrasonic anti-bark device doesn't effective in dogs with hearing problems and we don’t recommend using this product on dogs under six months or above 8 years old. Training is required to achieve highly effective and long-lasting use.