Features: Wide measuring range: 0 to 1000um High accuracy of ¡À1-3%n or ¡À2.5um Metric/imperial: Convertible Low battery indication Auto power off Specifications: Model: CM8821 Operating principle: Magnetic induction (F) Measuring range: 0 to 1000um Resolution: 0.1/1 Accuracy: ¡À1-3%n or ¡À2.5um Min. measuring area: 6mm Min. sample thickness: 0.3mm Metric/imperial: Convertible Battery indicator: Low battery indicator Power supply: 4*1.5V AA (UM-3)battery (not included) Operating conditions: 0 to +45 Centigrade (32 to 104 Fahrenheit), =<90%RH Dimensions: 160*68*32mm weight: 250g (not including battery) SKU: X1IN10336 PAckage includes: 1 * CM8821 Thickness Meter 1 * Operational manual