With the introduction of the new HoundHunter model, specifically designed for controlling tracking and trailing dogs, you keep the thrill of the chase within your control. The model SD-3225 allows control of up to six dogs. The compact transmitter features color-coded indicators that correspond to available collar strap colors. It is ideal for hunters who pursue bears, bobcats, mountain lions and raccoons with multiple dogs. With a range of up to two miles, keeping control of a long-range pursuit is easier than ever. Once again SportDOG Brand delivers on our promise: Gear the way you'd design it: Features: Up to eight correction levels. Choice of continuous or momentary stimulation. 21 Stimulation levels (7 each at low, medium, or high setting). Vibration and tone options. 2-mile range. Ergonomic, slim-profile collar receiver. Convenient docking station charges system in two hours. DRYTEK waterproof design technology. Expands to 6 dogs (with SDR-AH Add-A-Dog receivers). Choice of stim / vibe or stim / tone available for up to 6 dogs at a time. Basic training DVD and manual included.