SportDOG SportTrainer 1275 - Black - The SportDOG Brand SportTrainer 1275 gives you long distance control of your dog and features an easy-to-read OLED screen that clearly displays the selected dog, static stimulation level, and mode, as well as battery status. Large plus/minus buttons make toggling among dogs and changing stimulation levels a breeze, making the SD-1275 especially suited for multi-dog hunting situations. For dogs 8 pounds or larger with neck sizes 5in - 22in Expandable to 6 dogs Collar Receiver charges in 2 hours, lasts 140-160 hours per charge Remote Transmitter charges in 2 hours, lasts 50-70 hours per charge