An ergonomic collar especially designed for small to mild-mannered dogs. Dogtra ARC comes with a 3/4-mile range, a waterproof collar/receiver and transmitter. The collar features a low profile with a Rheostat/volume dial with up to 127 levels receiver and has a low to medium output designed for all kinds of breeds. The transmitter have a checkered grips for a firm grip with a LCD screen display that has 3 bar battery life icon. This unit comes with a rechargeable 2-hour rapid charge Lithium Polymer battery and is expandable up to two dog system.