Product Name: Intelligent Automatic Adjustment Alarm Sound Vibration Bark Stopper Dog Trainer Dog Collar Rechargeable Material: TPU Neck circumference: 15-55cm Power supply mode: lithium battery Battery capacity: 300mAh Charging method: USB Features: NO REMOTE CONTROL OPERATION: The collar works in automatic mode, a combination of sound and vibration, effectively and safely stops barking. In the first bark there is only one sound signal, in subsequent barks vibrations are added to a sound signal. Useful when you are away from home and your dog is alone. Notice The alarm sound output mode is the same as the vibration output mode of 7 times, the first time is the shortest, and the 7th time is the longest. If the dog still does not respond, the product will automatically stop working. After 1 minute, the working mode will be automatically restarted, or you can press the switch button to restart. This product will automatically stop the protection work if it is triggered more than 7 times within one minute to prevent pets from getting used to it at the beginning.