Size: 37 * 25 * 100mm Color: Grey Material: ABS Packaging Content: 1 * Dog Drive 1 * USB Data Cable 1. Updated and Effective Sound Wave Barking Alarm. The updated dog behavior control device is equipped with two ultrasonic frequency modes - variable frequency mode and fixed frequency mode, which makes it easier and more effective to attract the dog's attention and correct dog errors. Safe and user-friendly animal orthotics. 2. Easy to use and train with one click. If the dog barks, digs, fights, eats unsafe food, etc., simply press the button and point it at the dog. When the device is working and emitting ultrasonic waves, the LED indicator lights up in green. 3. Lightweight and portable. The dog training equipment is portable. You can put it in your pocket, which is very suitable for indoor and outdoor use. It can also prevent other dogs from approaching you while jogging, walking, or running. 4. The remote control and USB charging device of the ultrasonic machine are effective within a range of 16.4 feet. The shorter the range, the better the effect. The built-in battery with a capacity of can be fully charged within 8 hours, equivalent to 15 days of normal use. 5. Suitable for most dogs. The bark control device can be used for different breeds and sizes of dogs. It is not recommended for dogs under 6 months old as it can damage hearing development and is not suitable for aggressive or hearing impaired dogs. For better results, please do not use it in noisy environments.