Anti-Bark Collar for Small and Medium Dogs, 53g Ultra-Lightweight, No Electric Shock, Fully Automatic, 7-Level Beep & Vibration Easy Yu-Packet Post Shipping Recommended for All Breeds and Sizes About this product 【Latest Anti-Bark Collar】Designed for high effectiveness and safety, with no electric shock. It safely trains your dog with 3 modes: beep, vibration (levels 1-7), and automatic protection. Ideal as an anti-bark collar. 【Smart Dual Sensors】Detects barking at specific frequencies and decibels, preventing malfunctions from other sounds or other dogs' voices. Optimal as an anti-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. This anti-barking device can be used for medium to large dogs.