Dogtra T&B Dual 2-Dog Long Range 1.5-Mile Training & Beeper Remote Dog Training E-CollarEXPANDABLE DUAL DIAL: The T&B DUAL 2 DOG comes as a 2 dog setup, so the transmitter comes with two sets of Rheostat Dials that are dedicated for up to two dogs. With this expandable device setup, you wont have to keep changing the correction level for each dog and can seamlessly operate one or two dogs. PRECISE CONTROL: With 127 correction levels, youll have no problem finding the perfect level for your dog with the gradual and precise control. The