0.001g 50g Electronic Digital Scale 200g 0.01g Mini Scale Precision Professional Pocket Scale Milligram Calibration Weights Specifications: Material: ABS + Stainless weighing pan Capacity: 200gx0.01g / 50gx0.001g Units: g / oz / ozt / dwt / gn / ct Tare Function: Supoort Auto Off: 180 seconds off Operation Temp: 10-30 Power: 2 x AAA batteries (Not Include) Note: When using for the first time, please calibrate the weight with a wearing weight. Changes in latitude and longitude will affect its accuracy. The scale must be placed on a very stable water platform. Even small vibrations can affect the reading, sometimes significantly.In order to ensure the accuracy of the measurement, please place the items in the center of the weighing pan. Do not load more than the maximum capacity weight on the scale. Avoid shaking, dropping or otherwise shaking the balance. This is a precision instrument and must be handled with extreme care. Package Included: 1 * Digital Pocket Scale 1 * 50g Calibration Weight