Anti-bark collar for small dogs 2.3-6.8 kg, with adjustable powerful vibration function, no electric shock or sharp teeth, will not harm your puppy, safer to use. Rechargeable anti-bark collar, charging only takes 1-2 hours, working time is about 15 days, IP67 waterproof dog collar can be used outdoors in any weather. Equipped with smart sensors and chips, this anti-bark collar detects dogs that bark at a specific frequency and decibel and will no longer be mistakenly triggered by other noises or other dogs. Anti-bark collar for dogs of all sizes, it is a lightweight anti-bark collar for small dogs 2.3-6.8 kg and neck sizes 15-50 cm, perfect as an anti-bark collar for small dogs like Chihuahuas. The dog collar has 5 sensitivity levels and can be easily adjusted to the ambient noise