Easy four-button operation. All analytical models include a 9"H draftshield that allows easy access from both sides and the top without a top frame in the way. Side doors operate without a top rail and the top panel is a flip-top for fast access to the weighing chamber. RS-232 interface allows data connection to PC or printer. Integral weigh-below hook included for density or specific gravity determination. Complete built-in GLP/GMP capabilities include date, time, balance serial number, user ID/product ID and results. Choose from three capacities, with or without internal calibration.