The Dogtra orange strap additional/replacement receiver for the Dogtra ARC Transmitter features a contour design that curves and wraps around the front of the dogs neck. The collar is adjustable up to 28 inches and has 127 levels of gradual adjustment in stimulation intensity. Designed for dogs 15 lbs and above. The splitter cable allows charging of the transmitter and collar at the same time. The additional collar lets you expand your Dogtra ARC Remote Trainer to a 2-dog system. Includes: waterproof orange receiver collar, rechargeable battery, 2 hour rapid battery charger, test light-ensures proper operation of collar and an owners manual.