SportDOG Brand SportTrainer 575E - SD-575EThe SportDOG Brand SportTrainer 575E is an e collar system designed for field training and hunting with close working dogs. It supports training two dogs with the same handheld remote when you add an Add A Dog Collar (SDR AF), making it ideal for multi dog training. Range: 500 yard range Multi dog capacity: Train up to 2 dogs with the same handheld remote with purchase of additional Add A Dog Collars (SDR AF) Stimulation and modes: 10 static