About this item The scale can be weighed in different ways. All necessary units of measurement are included for easy weight conversion, converting measurements between g, oz., Ct., Ozt., Dwt and gn to seconds. Designed with a rubber platform stainless steel and a protective cover, the scale is a lightweight and compact solution for all your portable weighing tasks. The scale is accurate to thousandths of a gram (0.001g). With a built-in high precision sensor system, the pocket scale gives you instant accurate results from 0.01g to 20g. Although your scale is calibrated on delivery, we have included two 10 g calibration weight. If you notice any inaccuracies with your scale throughout its use, simply use these weights and follow the instructions to recalibrate them so you can continue to use your scale accurately Jewelry scales warn users from weak batteries, overloading and uneven surface placement. Automatically shuts off after 30 seconds of inactivity to help preserve battery power and efficiency