This portable digital scale features mini size and high precision (0.001g), ideal for precision weighing of precious metals, jewelry, gold, gems, medications, herbs, etc. Support 6 units conversion and with tare, calibration, pieces counting, auto off functions. Features: 1. This scale with high precision of 0.001g is ideal for precision weighing of precious metals, jewelry, gold, gems, medications, herbs, etc. 2. 6 units conversion: g / gn / oz / ozt / dwt / ct, convenient to use. 3. With tare, calibration and pieces counting function, 3 minutes auto off. 4. Digital display screen with blue back-light makes it display data clearly and readable in low light condition. 5. Comes with a windshield for stable weighing process. 6. Smooth platform will not stick the weighing objects, and it's delicate and beautiful. 7. Mini in size, user-friendly and portable. Specification: Item Type: Jewelry Scale Material: Plastic Item Color: As Pictures Shown Max Capacity: 10g, 20g, 50g, 100g (Optional) Min Capacity: 0.005g Accuracy: 0.001 Weighing Error: ≤0.003 Calibrating-weight: 10g, 20g, 50g Unit Switch: g / gn / oz / ozt / dwt / ct Back-light: Blue Operating Temperature: 10℃-30℃ Power Control: Auto power off after 3 minutes without operation (set up) Power Supply: 2 * 1.5V AAA Batteries (Not included) Low Voltage Display: LO_ Overload Display: O_Ld Product Size: Approx. 15.5 x 8 x 2 cm / 6.1 x 3.1 x 0.8 inch Package Size: Approx. 18 x 11 x 4 cm / 7.1 x 4.3 x 1.6 inch Package Weight: Approx. 135-178 g / 4.8-6.3 oz Package Include: 1 * Jewelry Scale 1 * Weight 1 * Tweezer 1 * Small Tray 1 * User Manual Note: 1.Please allow 0-3 cm error due to manual measurement. Thanks for your understanding. 2. Please do not place anything larger than the rated weight on the tray. This may damage the sensor. Do not impact the weighing tray when placing objects. 3. Please use this product in the best 10-30℃ environment, excessive temperature difference may produce test error. 4. If the temperature difference is too large, please correct the product with standard weights before use. Calibration must ensure that the product is in the same environment for more than 30 minutes.