Internal rechargeable battery system allows for a continuous operation of 270 hours before recharging. 10,000 x 1 lbs. All plated steel and temperature compensated. 50,000 X 5 lbs. 50,000 lbs x 5 lb wireless crane scale hanging scale made in the usa a 300 foot line of sight range between the load cell and the receiver allows the scale to be used in a safe area.