1. The maximum weighing capacity of this jewelry scale is 5000 grams. The ultra-high-precision sensor enables weighing accurate to 0.01 (the display result is accurate to two decimal places). It is suitable for precious items that require high-precision weighing, such as gold and diamonds. 2. You can switch between 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. 3. There are two charging methods. It has a built - in rechargeable lithium battery and comes with a USB charging cable. You may need to use 2 AAA batteries (not included). You don't have to replace the AAA batteries frequently, and USB charging is more worry - free and environmentally friendly. 4. 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 may 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. 5. Material: Stainless steel. 6. Color: Black. 7. Package contents: - 1 food scale - 1 USB cable The package mainly includes the above contents and may not include other products. 8. Note: Light reflection and different displays may cause slight differences between the color of the item and the actual product. The measurement tolerance is +/- 1 - 3 cm.