This carat scale is specially designed for being used as gold scale, milligram scale, jewelry scale, lab scale, diamond scale and karat scale. It’s professional mini scale with high precision (20g/30g/50g 0.001g) which used in family kitchen food weighing, baking material, common powder, etc. Specifications: Color: Black Material: ABS CapacityAccuracy: 20g0.001g / 30g0.001g / 50g0.001g (Optional) Units: g / oz / ozt / T / ct / gn (Switchable) Nominal Value: 0.003g Repeatability: 0.002g Display: LCD 5 digits Back Light: Blue Backlight Functions: ON/OFF, UNITS, TARE, PCS Auto off Time: 1-5 Minutes (Adjustable) Power Supply: 2 * 1.5V AAA Battery (Not Included) Working Temperature: 0-40°C / 32-104°F Platform Diameter: 32mm Item Size: Approx. 144 * 85 * 50mm / 5.7 * 3.3 * 2.0in Item Weight: Approx. 140g / 5.0oz Package Size: Approx. 16 * 10 * 7cm / 6.3 * 3.9 * 2.8in Package Weight: Approx. 294g / 10.4oz Package List: 1 * Digital Scale 1 * 20g Calibration Weight 1 * Weighing Pan 1 *