Dog Training Collar Ultrasonic Bark Control - Waterproof Beep Sound Vibration Collar 7 Sensitivity Levels Adjustable Anti Bark Collar Dog Collars for Medium Dogs Training No Shock and Harmless NEW GENERATION & AUTO-PROTECTION MODE: The anti bark collar will not be activated by other vibrations or sounds, only your dog's barking can trigger it. The bark collar will enter auto-protetion mode if it keep activates for 7 times in one minute, smart design for your dog SAFTY & No SHOCK: FCC, CE and RoHS proved bark training collar is a humane collar harmless for your dog barking, warning sounds and vibration, effective and harmless to stop dog barking PERFECT FOR ALL SIZE BREEDS & WATERPROOF: Adjustable collar length 9-22 inch, fits 5-150 lbs dogs, suitable for small/medium/large dogs but not tiny dogs. IP65 waterproof, wearing collar in rainy weather is allowed, please take off the anti bark collar when the dogs go swimming REFLECTIVE STRIP & 4 DIFFERENT COLOR COVERS: Come with a safety reflective strip, keep your dog safe when walking or running at night. It comes with 4 beautiful colors for boys and girls that any owner will love! GUARANTEE: 1-Year Free Warranty & Lifetime Customer Service. If you have any problem with the bark collar, just contact with MATOP seller support. We will reply you within 24h, and solve your matter out SENSITYVITY ADJUSTMENT: 7 levels of sensitivity adjustment by "+" and "-" buttons, to be suitable for different stubborn dogs