1100 Yard Range with compact antenna technology; MAXX-Range 360 Internal Collar Antenna System; Fully Waterproof Transmitter-Remote (uses 9v Battery); 16 intensity levels of Gentle Touch Nick and Continuous e-Stim; Vibration Assist (No Shock Vibration training stimulus); Built in Magnetic ON/OFF system; Compact, lightweight, 100% waterproof collar is fully rechargeable; Collar adjusts from 7" to 22" in 1/2" increments and weighs only 4.7oz; Expandable to 2-dog or 3-dog system (with easy turn dial); Add on collars available (Black, Camo, Orange or Green collar choice)