A. The maximum weighing capacity of this jewelry scale is around 5000 grams. The ultra-high-precision sensor allows for weighing accurate to approximately 0.01 (the display result is accurate to two decimal places). It is suitable for precious items that need relatively high-precision weighing, such as gold and diamonds. B. You can switch between about 7 units by pressing the "UNIT" button, including grams (g), kilograms (kg), etc. You can also set the auto - shutdown time. When the scale is on, long - press the "TARE" button. Release it after the numbers appear, then click the "PCS" button to adjust the standby time (3/5/15 minutes). Set it to 0 to disable the auto - shutdown function, and click the "UNIT" button to confirm. C. There are two charging methods. It has a built - in rechargeable lithium battery and comes with a USB charging cable. You need to use 2 AAA batteries (not included). You don't need to replace the AAA batteries very often, and USB charging is relatively worry - free and environmentally friendly. D. It can be used or carried at any time. It has a backlight function, so you can read the numbers clearly at night. In addition, there will be a warning prompt when the battery is too low or the weighing is overloaded. It is suitable for weighing small precious items such as gold and silver, coins, jewelry, gemstones, tablets, weight - loss products, cooking herbs, and spices. E. Material: Stainless steel. F. Color: Black. G. Package contents: - 1 food scale - 1 USB cable The package mainly includes the above contents and few other products. H. Note: Light reflection and different displays may cause some slight differences between the color of the item and the actual product. The measurement tolerance is around +/- 1 - 3 cm.