Pet Dog AntiBarking USB Electric Ultrasonic Dogs Stop Barking Vibration Anti Bark Collar Automatic Collar Dog Training Collars

• USB Rechargeable :No need for batteries, simply plug in and charge via USB for convenience. • Ultrasonic Technology :The ultrasonic sound waves emitted by the collar are inaudible to humans but effective in deterring barking. • Automatic Collar :The collar automatically activates when it detects barking, making it easy to use and effective in training your dog. • Vibration Function :The collar also has a vibration function that can be used as an alternative to the ultrasonic sound waves.   Specification:  Condition: 100% Brand New Material: Plastic + Nylon Size: Approx.6.7 * 4*3cm /2.64*1.57 * 1.18in Battery: Built-in 300mA battery Charging Method: USB charging Adjustable Diameter Range: 6-36cm Voltage: DC 5V Pet size: all size   Features: With 7-level sensitivity adjustment, it is an efficient behavior modification tool that will help you train your dog to bark less. Can be easily charged with the USB cable. It's tinier, lighter and comfortable for dogs. Whether your dog is a small