The Dogtra Cue Gen 2 Electronic Collar Training System for Dogs delivers pro-level performance with keep-it-simple usability. You can customize the oversized, easy-to-push buttons to create a setup that works for you, and the large LCD display screen clearly shows settings and other important info. Correction output adjusts from 0 to 99 micro-levels and feature the customizable Boost option, so you can tailor the Cue Gen 2 to your dog. Choose from 4 modes, including Nick, Continuous, Pager Vibration, and Boosted Continuous. Low-frequency stimulation offers more tolerable and safe correction, and plastic contact points go easy on dogs with sensitive skin. Also features a safety-level lock, a 400-yard range, and a built-in carabiner hook. IPX9K extreme waterproofing ensures the Cue Gen 2 can stand up to the elements. Collar can be worn vertically or horizontally. Expandable with up to 3 dogs (additional units not included). This dog-training-collar system includes a transmitter, a receiver, and a USB Type-C cable. Customize oversized, easy-to-push buttons to create your own setup Large LCD display screen clearly shows settings Correction output adjusts from 0 to 99 micro-levels and feature the customizable Boost option 4 modes: Nick, Continuous, Pager Vibration, and Boosted Continuous Low-frequency stimulation offers more tolerable and safe correction Plastic contact points go easy on dogs with sensitive skin Safety-level lock 400-yard range Built-in carabiner IPX9K extreme waterproofing Collar can be worn vertically or horizontally Expandable with up to 3 dogs Includes transmitter, receiver, and USB Type-C cable