Key technical factors include Linearity, which ensures the balance is accurate across its entire weighing range, and Repeatability (Standard Deviation), which guarantees consistent results when the same object is weighed multiple times. You should also prioritize models with Internal Calibration (Auto-Cal), as this allows the device to adjust itself to environmental changes like temperature fluctuations without requiring external weights. For high-precision tasks, look for a Draft Shield to prevent air currents from affecting the sensors.