Pet Bark Stopper Automatic Dog Trainer Collar(Black)

1. Color: blackred 2. Material: ABS 3. Dimensions: about 17 x 5 x 11 cm / 6.69 x 1.96 x 4.33 inches 4. Battery: 6V battery (not included) 5. Maximum adjustable range: about 50cm / 19.68 inches 6. Train your dog to use this ring to control barking. 7. Barking vibration can be accurately triggered (cannot be activated by other dog barking). 8. Sound: A harsh buzzing sound is emitted to prevent barking. 9. Ultrasound: work by sending out ultrasonic signals, which can only be heard when the dog is barked. 10. Adjustable elastic collar to fit different dog sizes.