Keep your dog safe and wellbehaved With this innovative training system, you can use your smart phone as a remote, handheld trainer. Simply press a key on your phone's display, and your dog will receive a vibration, tone alert or corrective stimulation from the electronic collar. Set limits and keep your dog safe around the house with this Device and Keep Away training system. The Keep Away tag creates a virtual fence with a threefoot range. Your dog will receive stimulation when he approaches "nogo" zones that you have designated. You'll never have to come home to an overturned garbage can, chewed shoes in a closet or an excavated flower bed again. If you do not have a smart phone, the Bundle option (2N1A) includes a remote. One size fits most. Imported.