The PetSafe Lite Rechargeable Bark Control Collar decreases nuisance barking, whining and whimpering. This waterproof collar was designed for dogs that might need a milder static stimulation than one of our standard bark collars. This collar utilises unique bark-sensing technology to only activate when your dog barks. The collar automatically adjusts through 15 levels of safe, but annoying static stimulation levels to find the perfect setting for your dog. As your dog learns to bark less, stimulation levels are reduced. Key Features: • 15 Lite Levels Of Automatically Adjusting Static Stimulation - A milder level of static stimulation for sensitive or smaller dogs that adjusts according to how often your dog barks • Reduces Barking, Whining and Whimpering - New technology will only trigger when your dog barks; it will not activate in response to another dog barking or other noises• Waterproof, Rechargeable - Uses a quick charging wall adaptor (included) • Adjustable, Replaceable Strap - Includes premium coated strap that fits neck sizes up to 61 cm. Features: •For indoor or outdoor use •For dogs 3.6 kg and up •Fits neck sizes up to 61 cm •Perfect Bark™ sound & vibration sensors - only your dog's bark causes stimulation •Waterproof •Uses a rechargeable battery (built-in; non-replaceable) •Battery usually lasts 40-60 hours •Battery recharges in 4-5 hours •Good/low battery indicator •Two Colour LED: Shows good or low battery. System Includes: • Bark Collar • USB Charging Cable • Test Light Tool • Long Contact Points