High-Precision & Quick Respond: Digital pocket kitchen scale built with high precision sensor system, provides accurate and instant measurements from 0.01g to 220g, which is suitable for food, gemstones, coins, jewelry, gold, etc.<br> 100g Calibration Weight: Auto calibrate to ensure accuracy. It’s fast and easy to tare and calibrate with the 100g calibration weight, and its pocket-size (5.51''x3.11''x0.91'') meets for many of your portable weighing requirements.<br> 6 Weighing Units: The weed scale includes all the necessary weighing units for easy weight translations, converts measurement between g/oz/ozt/dwt/ct/gn in seconds through one button press.<br> Multifunctional: The weigh gram scale will auto-off after 60 seconds of inactivity to save battery power. Large size digits and stark contrast LCD red back-lit display, make it easy to read in all light conditions.<br> Rechargeable Battery: Compared with other jewelry scale, ours are more environmental with usb charge not dry cell.