SportDOG Rechargeable NoBark 10R Bark Control Collar (SBC-10R) w/ (1) FREE NoBark 10R Replacement Battery Kit(SAC00-13057) FREE NoBark 10R Replacement Battery Kit (additional battery) For dogs 8 pounds and up; neck sizes 6-28 inches 10 stimulation levels PerfectBark Sound & Vibration Sensors; only your dog's bark causes correction, eliminating false alarms DRYTEK waterproof and submersible to 25ft