【Latest Anti-Bark Collar】Highly effective and designed without electric shock for peace of mind. Safely train your dog with 3 modes: beep, vibration (1-7 levels), and automatic protection. Ideal as an anti-bark collar. 【Smart Dual Sensor】Detects barking at specific frequencies and decibels, preventing false triggers from other sounds or other dogs' voices. Optimal as a no-bark collar. 【Long-lasting Rechargeable】Can be used for approximately 20 days with a 2-hour charge. USB charging method, perfect for preventing barking. 【Suitable for a Wide Range of Dog Breeds】Fits neck sizes 18-54cm and dogs weighing 2kg-30kg. Anti-barking device that can be used for medium to large dogs. 【Ultra-Lightweight and No Burden】Lightweight design of only 53g, does not put a burden on your dog's neck. Also excellent as a training collar.