Whether you're a professional trainer or a serious amateur, the RT offers the simplest solution to the most complex training. The RT transmitter gives you a 'no look' one-hand operation, so your eyes are always focused on your dog. The 8 levels of Nick and Constant stimulation coupled with Dogtra's Combination Buttons, offer a wide range of stimulation for every dog and every training situation. Features include 1-mile range, rapid charge batteries, hard travel case and a fully waterproof collar/receiver and handheld transmitter. Contents Transmitter, Receiver/Collar 1 Additional Receivers sold separately. 5/8contact points, which are standard-and contact point washers included that allows the points to be extended to 3/4 . Battery charger and splitter cable, Test light, Owner's manual, Contact point, extensions 2 and adjustment tool, Metal belt clip and screws 2 and Carrying case. Features n Rechargeable 2-hour rapid-charge Lithium Polymer batteryn 'Nick' and 'Constant' stimulation along with a non-stimulating pager/vibrationn User Expandable to a three-dog systemn Fully waterproof transmitter and receiver/collarn Intensity selection dial stimulation level 1-8 Item Details