AND Newton EJ [EJ-123] Portable Precision Balance with External Calibration, 120g x 0.001g - 110mm. The AND Weighing EJ-123 Newton EJ Portable Balance 120g x 0.001g is affordable that offers flexible and practical performance. The EJ123 smartly optimizes counting accuracy with "ACAI" that auto improves accuracy throughout your counting procedure. The EJ123 external calibration switch and gravity acceleration correction keeps you accurate and precise.