Avoid False Trigger & Waterproof: Compared with other dog training devices, the triggering sensor equipped in this bark collar will activate Only when your dog barks. IPX5 level Waterproof design for daily life but doesn't suit swimming or bathing. Protection Mode & More Humane: No electric shock, no stimulation, safer and more humane. 1st barking will just beep sound, your pet bark collar will stop work if trigger 10 times in 80 seconds and resumes its function after 1min. It is design humanized to keep the dog's barking instinct while preventing constant barking. Adjustable Strap Fits Most Dogs: You can adjust the length of the collar strap according to the size of your pet. Strap Length: 8-27 inches long. Not recommended for dogs who under 8lbs/under 6 months/long-haired dogs/dogs smelling impaired. Rechargeable & Led Ball: The collar uses a long-life 300mAh lithium-ion battery, which can be charged for 2 hours and used for 11 days. Low battery red led light flashes, standby green led light flashes. Include a led light ball accessory to help you quickly find your dog at night. Professional Service: 【Include Citronella Spray】 It is recommended to refill citronella each time before use. This collar cannot match the remote control. If you have any questions, please connect us, our professional service team will answer.