The Educator ET-400 1 Dog E-Collar 3/4 Mile Remote Dog Trainer is a high-quality training tool designed for dogs weighing 5 lb and larger. With a range of 3/4 mile, this trainer provides greater control and flexibility during training sessions. The unique COS (Control of Stimulation) technology allows for 100 dial adjustable levels of clean stimulation, including blunt and Pavlovian. The trainer is equipped with rechargeable ni-MH batteries, making it convenient and cost-effective. It is also waterproof and shock resistant, ensuring durability in various weather conditions. The package includes a transmitter, receiver, collar, remote, and charger, providing everything you need for effective dog training.