Features:
Can make vibration to restrain the dog's barking automatically.
The vibration is safe and effictive， without electric shock.
The allowable bark degree and vibration degree are adjustable， you can adjust the according to needs.
Different levels of vibration to teach your pet.
Adjustable collar length fits different size of dogs， suitable for most of small and medium dogs.
Low battery consumption.

Specifications:
Power supply: 3 * LR44 Batteries (not include)
Item size: 5 * 2.5 * 2.4cm
Item weight: 23g
Package size: 22.2 * 11.5 * 4.5cm
Package weight: 111g

Package include:
1 * Anti-Bark collar
1 * Black collar straps
1 * Special screwdriver