The SportDOG Brand SportHunter 825X is our introductory shock collar to the long-range, SportHunter family. This 825X model uses the smallest collar of the family while still providing up to 1/2 mile range for up to 3 dogs (with purchase of Add-A-Dog collars). Designed in the field by hunters and dog trainers just like you, the SD-825X allows you to communicate with your dog using tone, vibration, or one of the 21 levels of static stimulation. The remote is designed to be operated without having to look at it, needing only a slight movement of the dial and the push of a button to deliver a stimulation. This customizability and ease-of-use ensures your training is consistent, immediate, and tailored to your dog's unique personality. SD-825X Features: - Upgraded version of the SD-825 to provide 21 levels of shock stimulation (instead of 7) and easier functionality -1/2-mile of range (880 yards) - 21 levels of static and the option to train with vibration (buzz) and tone (beep) Training tool for safety, off leash, recall, control, getting attention, obedience, correcting bad behavior, and ensuring commands are followed - Detailed operating guide and a locally based Customer Care Center provide support when you need it By designing our products in the field, with heat, cold, rain, snow, dust, mud, and wind in mind, SportDOG has become one of the most recognized brand in the electronic tracking and training categories, making the promise to always create "Gear The Way You'd Design It"