Safe, effective, simple setup with 4 modes and 5 sensitivity levels. Enjoy quiet time with the press of a button. Smart chip auto-stops barking via sound and vibration (no remote). Features a safety mode, pausing after 6 activations. Clear display shows status and battery. Fast charging provides 15-20 days of use. IP67 waterproof for all-weather training. Fits most dogs (8-150 lbs, 8-25" neck). Ideal for dogs over 6 months. Adjust the length as your dog grows. See manual for optimal use.