"Features PS-USB scales are particularly suited to shipping and warehouse applications and general purpose weighing. These are very affordable scales with high accuracy. The triple power modes (battery, AC adapter and USB)enable portability or permanent installation. The PS-USB features RS-232/USB interface that can transmit and receive using a demand type protocols with adjustable feet and leveling bubble for precise weighing. Units— kg, lb., lobos* (*non-NTEP) Display— 6½ digits 25 mm / 1"" high, seven segments LCD with blue backlight Construction— Heavy duty cast aluminum base with stainless steel platter. Power— 6VDC 500mA adapter with center positive or four AA batteries RS-232 and USB Interface Emulation Protocols: Standard NC default with field configurable settings once, 8213, 3835 and Auto send. Interfaces with software programs such asps World ship Online. Platform Dimension—355 mm (W) x 305 mm (L) / 14"" W x 12"" L Product Dimension—355 (W) x 411 mm (L) x 80 mm (H)14"" W x 16"" L x 3.15"" H"