This Schroder GSM200F is a fabric weight balance machine has plastic wind shield housing, maximum 200g x 0.01g / 20,000g/m2 x 1g/m2 / 7 oz x 0.0005 capacity, built-in four display units g / g/m2 / oz/oz/yd2, 100 mm round platform diameter, 12 VAC power supply ~150mA adapter or 6 x AA batteries