Training starts with Dogtra CUE, the newest Remote Trainer with essential training and safety features, a Big LCD Screen, and Big Main Button. CUE offers 3 training modes; Nick, Continuous Nick, and Pager Vibration, along with Customizable Boost for instant level increases to recall your dog. The unique remote transmitter design with a built in Carabiner Hook allows you to attach CUE to your dog leash, belt loop, lanyard, or backpack to easily access all training functions.