Humane and Harmless System --- The no bark collar has an adjustable sensitivity and 3 training modes（beep, vibration, shock）, 0-7 adjustable grade of those functions, gentle shock is safe or you can choose no shock mode as your needs, effectively stop barking with no harm to dogs of all types Smart Barking Detection Chip --- Intelligent barking vibration detection instead of sound detection chip prevents false triggering. Only your dog's barking can trigger the collar while other dogs' barking nearby can’t trigger it Rechargeable & Waterproof - Built-in USB rechargeable battery and can be filled for an hour, full of electricity can be used continuously for 14-20 days.Now you can walk your dog anytime as the waterproof device is able to work effectively even in wet weather, but not suit for swimming. LONG-LASTING BATTERY LIFE - Rapid Charging Lithium Ion Battery Provides a long lasting Battery Life. Auto Power Protect Mode Helps Conserve Battery Life When Not In Use.The product can be filled for an hour, full of electricity can be used continuously for 14 days. 100% SATISFACTION GUARANTEED & BONUS - We offer 1 YEAR Replacement or Refund Warranty.we love our pets & we take great pride in manufacturing & selling only the most humane, high quality pet products for our loyal customers. If for any reason you are not satisfied with your purchase please contact us.