Features:
1. 7-level sensitivity adjustment: With a 7-level sensitivity adjustment, it is an efficient behavior modification tool that will help you train your dog to bark less.
2. Rechargeable: It can be easily charged with the USB cable. It is convenient for charging.
3. Comfortable design: It is smaller, lighter and more comfortable for dogs. It will not jurt your dog.
4. Compatible: Whether your dog is small or large, our adjustable dog bark collar can fit the bill perfectly.
5. Waterproof: The necklace is waterproof, don't worry about wearing it even in rainy days.
Description:
This bark stopper dog training device is durable, it is precise and convenient to control, which helps to train the dog well.
Specifications:
Material: Plastic + Nylon
Size: 6.7 * 4 * 3cm
Battery: Built-in 300MA lithium battery 
Charging method: USB charging 
Adjustable diameter range: 6-36cm 
Voltage: 5V
Package Included:
1 pc * Dog Bark Stopper
Notes:
1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding.
2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.