120g x 0.0001g w/ Automatic Internal Calibration. The AGCN120 is a budget friendly easy to use Analytical balance with automatic calibration. The internal calibration mechanism keeps the scale calibrated at all times therefore eliminating the need for external calibration, the scale is essentially maintenance free. In addition the scale includes 8 weighing functions, a large glass weighing chamber, die-cast metal housing, USB and RS232 interface port for PC connectivity.