PetSafe Pawz Away Instant Pet Barrier Extra Dog Receiver

Waterproof and battery operated barrier fits easily in small spaces; Lightweight, waterproof receiver collar with progressive static correction; Distinct settings for multiple pets; Easy setup and training; For dogs and cats 5 pounds and up and under 40 inches tall; Fits neck sizes 6-28 inches for dogs and up to 12 inches for cats; For indoor or outdoor use; Adjust range up to 5 feet; Add extra barriers for any number of protected areas; Add an unlimited number of pets with additional collars; Waterproof transmitter and collar

Use with PetSafe Pawz Away Outdoor Pet Barrier (PWF00-11923). Lightweight and waterproof. Progressive Static Correction. For dogs over 5 pounds. Fits necks 6"  28".