The A&D Stainless Steel Wash-down Scales SK-WP offer quick response measurements; LCD read weight displays with a pushbutton tarring capability and multiple units of measurement (/g). Models have no moving parts that wear out, are dustproof and waterproof (IP65), and are portable despite being constructed of sturdy stainless steel, including a removable watering pan. SK-WPZ models offer displays with decimal & fractional ounce quantities. Non-"Z" models are rated Legal For Trade. A power-off function turns the power off after approximately five minutes if the scale is left on, and the scale can be easily calibrated manually. A user can also calibrate the scale with weights instead of compensating for the gravity acceleration, and the scale offers different modes of calibration including a re-zero button.