A training and beeper collar recommended for the serious upland hunter. The DOGTRA 2500NCP has a low to high power transmitter which is easy-to-use and has blue LCD with a tri-color LED Battery Life Indicator. It has a one mile range with three beeper modes and a beeper volume control. The collar has rheostat intensity dial that has a precise stimulation level (0-127) with Nick & Constant Stimulation and is fully waterproof. This unit uses has one-charger system to charge the transmitter & receiver at the same time and is expandable up to two-dog system.Can train up to one dog.