The Sportdog SportHunter 825X Grey Dog training collar is a reliable and efficient tool for dog trainers and hunters. Its compact design makes it easy to use in various environments. The collar's range extends up to 1/2 mile, allowing you to communicate with your dog effectively. This model is suitable for dogs weighing at least 8 pounds and having neck sizes between 5 and 22 inches. Fast shipping ensures that you can start training your dog as soon as possible.Product Features and Specifications: Range: up to 1/2 mile Number of dogs: up to 3 (with Add-A-Dog collars) Weight requirement: 8 pounds or larger Neck size range: 5" - 22" Collar dimensions: 2.60"L X 1.30"W X 1.23"D Remote transmitter dimensions: 7.00"L X 2.00"W X 1.24"D