D. T. Systems Micro-iDT Plus Remote Electronic Dog Training Collars -
Digital system is a great choice both for the field and around the house, with a full 1/2 mile, 900 yard range. The waterproof collar delivers 16 levels of remote-controlled continuous and momentary stimulation including GTS, plus vibration for maximum versatility; its Maxx-Range internal antenna is sewn-in for 360º reception. Weather-resistant transmitter; system is expandable for use with up to 3 collars. (1 collar is included with system; additional add-on collars sold separately). Includes rechargeable NiMH batteries in collar, 120V charger, and 9V battery in transmitter.