Description: Models 442-43N, 442-51N with power supply Models 442-432N, 442-512N with battery operation, mains adaptor can be reordered Connection socket for mains adapter (standard) Battery operation possible. Block battery (9V). AUTO-OFF function after 3 min without a change of load to preserve the batteries Adjustment program CAL. External test weights available at an additional price Add on weighing function simplifies mixing