The New Dogtra EDGE RT is designed for the most demanding training environments. 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 our 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, Intensity selection dial stimulation level (1-8), 1-mile range, Extendable contact points (5/8" to 3/4"), Warranty - 2 Year Limited Lifetime Warranty, Power - Low to High, Batteries - Lithium Polymer, LCD Screen - No, Carrying Case - Yes, Expandable - Yes, up to 2 additional receivers, Pager Mode (Vibration) - Yes.