IQ-210+ Digital Weight Indicator Features: Piezo Switch Technology with Stainless Steel Buttons (Zero and Units), Large, Bold .8" LED Display, NEMA 4X Stainless Steel Enclosure, Status Annunciators: lb, kg, oz, g, Negative, Motion, Center of Zero, One Full Duplex RS-232 Port, Two Digital Inputs for Remote Zero, Print and Units, NTEP Certified.