PetSafe Yard & Park Rechargeable Dog Training Collar with Tone and Static Correction, Waterproof, Up to 400 Yards 800 YARD RANGE - flexible enough to work for indoor training or for outdoor hiking with your dog 8 ADJUSTABLE LEVELS - static stimulation and 2 tones 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 THREE DOGS AT THE SAME TIME - with additional collars sold separately PAC00-12159 FITS DOGS OVER 8 lb. - good for dogs of all sizes; Fits neck sizes up to 28" Manufacturers warranty is only valid when purchased from an authorized retailer