Mini Portable Jewelry Scale HighAccuracy Electric Scale with Level Adjustment for Laboratory Item Type: Mini Scale Material: ABS+Stainless Steel Weight: Approx. 442g / 15.6oz Product Size: Approx. 14x7.7x5.2cm / 5.5x3.0x2.0in Battery Parameters: 2xAAA batteries (not included) Key Description: ON/OFF: Switch machine button PCS: Count key TARE: Tare key MODE: Unit conversion key Unit Conversion Key MODE, press this key to select the weighing unit you need, and there are multiple units for conversion. Conversion Value of Weight Unit: 1ct=0.19997g 1oz=28.3495g 1dwt=1.5552g 1ozt=31.1034g 1gn=0.0648g 1tl=37.4999g Deduction/TARE 1. Turn on reset to zero; 2. Place the deducted object on the weighing pan; Calibration Mode: 1. In shutdown mode, hold down the [TARE] key and then long press the [ON/OFF] key to turn on for 2 seconds to enter the internal code test state, and then short press the [MODE] key to enter the calibration mode. "CAL" is now displayed 2. In the weighing mode, long press the [MODE] key to enter the calibration mode, and "CAL" is displayed at this time 3. Press the tare key (TARE key) to display 0.0 or 0.00, indicating that the weight has been deducted 4. Then put in the item to be weighed, the reading at this time is the net weight of the item Calibration: calibration must have corresponding weights