Product: Size: 9.5 * 4.2 * 3.3 cm Color: Dark Gray Material: ABS Package includes: 1 * Dog Repellent: Updated Effective Sonic Bark Stopper Updated Dog Bad Behavior Control Device Equipped with Two Ultrasonic Frequency Modes - Variable And fixed frequency mode, which makes it easier and more effective to get the dog's attention and correct the dog's wrong behavior. Safe and humane animal orthotics. One-Click Ease Use One-Click Easy Training. If the dog barks, digs holes, fights, eats unsafe food, etc., just press the button and point it at the dog. When the device is working and emitting ultrasound, the LED indicator lights up green. Lightweight and portable dog trainer is portable and hand-held. You can put it in your pocket or pocket, great for indoor and outdoor use. It also prevents other dogs from approaching you while jogging, walking or running. Long control range and USB rechargeable device ultrasound machine is effective within 16.4 feet. The shorter the range, the better the effect. The built-in battery with a capacity of 1200 mAh can be fully charged in 5 hours, which is equivalent to 15 days of normal use. Compatible with most dogs The barking control device can be used for different breeds and sizes of dogs. Not recommended for dogs under 6 months as this can impair hearing development, nor for aggressive dogs or dogs with hearing problems. For better results, please don't use it in noisy environment.