Product Features:Nice pocket digital jewelery balance scale.Counting of jewelry and gems / precious metals / coins in commercial applications.500g capacity with 0.01 gram readability.Last digit blanking for fast and stable readings.Bright backlit 5bit LCD display is easy-to-read even in poor lighting environments.With square metal weighing tray and little round buttons."Tare" button on the display for zeroing out gem tray.Press "Mode" button for optional scale: g/ oz/ ct/ dwt / ozt /gn.Come in a tough synthetic leather pouch for protection.Auto power off.Low consumption for long time use. Note: Please take the black plastic cover off before using.As shown in the picture，the weighing tray is silver metal，not plastic cover.Also please place the scale on a level surface.Otherwise it couldn't function properly since it is a very sensitive product，vibration and draft can affect accuracy Specifications:Power Supply: 2 * 1.5V AAA battery ( not included )Size: Approx. 11 * 7 * 2cm/4.5 * 2.8 * 0.8inSize of stainless steel Pan: 70 * 65 mmOperation temperature: 10-30oCWeight: 115gColor: As shown in the picture Package Included:1 * Scale1 * Manual