Training small or timid dogs Improve your shy dogs behaviours with the press of a button using a digital remote and lightweight collarBack-garden trainer Works within a 275-metre range, its great for the home and back garden and you can train two dogs to behave using one remote with an extra collar (sold separately)3 training options Uses 3 different types of stimulation: tone (beep), vibration and 115 levels of static stimulation, including a safety lock feature for higher levelsTrain 2 dogs Easily train both your dogs with an Add-A-Dog® collar (additional collars sold separately)