2 training modes and 4 sensitivity levels: "Sound + Vibration" and "Sound + Vibration + Static Shock". This collar is very convenient for people who have no information about training their dog, just select the sensitivity level (4 most sensitive and 1 least sensitive) to train the dog. Anti-interference: This collar is equipped with intelligent sensors and chips that can detect the barking of the dog wearing it. The sensor filters out all noise and dogs barking next to your dog will not trigger the collar. LED indicators let you know the level, activation mode and battery status. Protection Mode: Smart anti-bark collar, if the collar is triggered more than 7 times in one minute, it will temporarily deactivate to avoid harming the pet. In this mode, the collar will stop working for 2 minutes. Suitable for long and short haired dogs: The collar has two different contact points depending on the size of your dog's coat. Rechargeable battery and IP67 waterproof: The built-in rechargeable