PetSafe Adventure Dog Remote Training Collar with Tone and Static Stimulation, Up to 800 Yards, Rechargeable, Waterproof 800 YARD RANGE - flexible enough to work for indoor training or for outdoor hiking with your dog 8 ADJUSTABLE LEVELS - static stimulation and 1 tone (beep) level to teach commands and correct behavior WATERPROOF COLLAR - for all of your dog's outdoor activities RECHARGEABLE BATTERIES - collar and remote use replaceable rechargeable batteries TRAIN UP TO 3 DOGS AT THE SAME TIME - with additional collars sold separately; PetSafe Yard and Park Add-A-Dog Receiver Collar PAC00-12159 FITS DOGS OVER 8 lb. - good for dogs of all sizes; Fits neck sizes up to 28" Call, chat or email with our expert PetSafe US-based customer care specialists six days a week; They are waiting to assist you and your pet with your product needs at 1-800-732-2677 or by email at ccc3@petsafe.net Manufacturers warranty is only valid when purchased from an authorized retailer