The Garmin Pro 550 has a 1-mile range plus 21 levels of continuous and momentary stimulation. Unlike Pro 70 and Trashbreakers, the 550 has add-on Upland Beeper capability and a vibration option. Run up to 3 dogs. One-hand operational features, a Bark Limiter, a remotely controlled beacon light on the receiver, a collar tone signal, and interchangeable contact points. Free shipping (UPS Ground).