Fangrui Product Details Mini Digital Scale For Jewelry, Gold, Lab Use. High Precision: Use I-shaped Sensor, Reacts Quickly And Accurately. Long Standby Time: Low Power Consumption And Environmental Friendly Product. Windshield Design: Effectively Avoid The External Disturbance. 60 Seconds Automatically Power Off When Not In Use. Plural Capacity/accuracy:0-20gx0.001g Readability: 0.001g/0.0001oz/0.0001ozt/0.001dwt/0.05ct/0.1gn Units: G/oz/ozt//ct/gn Auto Off: 60 Seconds Off Operqtion Temp: 10-30 Display: Led 5 1/2 Digits Power Supply: 2 X Aaa Battery(not Included) Colour:black Material:plastic Size:. 115 X 65 X 17mm/4.53 X 2.56 X 0.67inch Package Contents: 1 X Digital Scale 1 X User Manual 1 X Standard Calibration Weight 1 X Tray Only The Above Package Content, Other Products Are Not Included. Note: Light Reflection And Different Displays May Cause The Color Of The Item In The Picture A Little Different From The Real Thing. The Measurement Allowed Error Is +/- 1-3cm.