Pre-owned but in excellent condition. Dogtra 2300NCP Professional Grade High-Output 3/4-Mile 2-Dog Expandable Remote Training E-Collar EXPANDABILITY: This receiver is perfect for medium to large dogs with its durable design. It has all of the components of the 2300NCP e-collar, but is now expandable to 2 dogs. It’s designed for dogs 35 pounds or more and is perfect for mild to stubborn dogs. ¾-MILE RANGE: The range of this training e-collar is perfect for many situations and all simple commands for your dog. With a range of ¾-mile, this e-collar is perfect for advanced level pet training, competition training, police K-9 work, or any type of hunting. IPX9K WATERPROOF SYSTEM: The 2300NCP is IPX9K waterproof certified and was tested at a close range using powerful water jets with high pressure and high temperature. If your hunting or fieldwork leads you and your dog into wet/damp areas, you won’t have to worry about the collar malfunctioning. PRECISE CONTROL: With 127 correction levels, you’ll have no problem finding the perfect correction level for your dog with the gradual and precise correction control. The LCD screen is bright and easy to read while the levels can be adjusted precisely at any time with the Rheostat Dial. CORRECTIONS: This e-collar has two different correction types. The first correction type is a Nick (quick ½-second) and the second correction type is a Constant (up to 12 seconds). The e-collar also has a HPP (High Performance Pager) which offers a clear vibration to alert dogs while training. Find the right fit for you and your dog with this dynamic e-collar.