The Educator ET-302 2 Dog Mini Educator E-Collar 1/2 Mile Remote Dog Trainer is a high-quality training aid designed for pet owners with two dogs. With a range of 1/2 mile, this remote training collar allows you to effectively train your dogs from a distance. The collar features Lock and Set technology, which provides a clean stimulation without the normal head jerking motion often found in other training collars. It is also waterproof and comes with floating remote and receivers, ensuring durability and reliability. The collar is powered by lithium polymer rechargeable batteries and includes two waterproof miniature collar receivers, two Biothane collars, four sets of contact points, a contact point removal tool, a quad battery charger, an owner's manual with training tips, a lanyard for the remote, and a color storage box.