I. Key Feature1. Capacity/Accuracy: 20g/0.001g 30g/0.001g 50g/0.001g2. Nominal Value: 0.003g, Repeatability: 0.002g Resolution: 0.001G (key indicator: objects loaded with 0.001G when weight is greater than 0.003G or above can be identified by LCD.)3. Scale Size: 144x84.5x51mm4. LCD Size(Blue backlight): 375x15.5mm5. Battery: 2**AAA (not include)6. Low battery alarm: Lo7. Platform size: Diameter 32mm(stainless pan included)II. Function Buttons and Instruction1.ON/OFF(Switch on/off)Put batteries into the battery room of the scale, Place the scale on a solid and flat board without wind and vibration, keep the bubble in the center of the black ring. Put ON/OFF will show 88888 then 0.000, its ready to work. Press ON/OFF switch off the scale. If there is wind when weighing, please put down the wind shield.2.UNIT(Unit switch button)Press [UNIT] to switch weighing unit: g/oz/gn/ct/t/oztPress [UNIT] key for 4 seconds, all the units will light up and unit OZ blink, then press PCS to hold or close this unit, Press UNIT to select next unit, unit g can not be closed. Press [UNIT] for 4 seconds to return normal weighing state.3.TARETouch [TARE] to for Re-zero.4.PCS(Counting function)Select 25pcs of samples(or 50,75,100pcs of samples) At normal weighing state, put the samples on the scale, then press PCS 4 seconds and the scale shows the weight of the samples, press PCS to confirm, then LCD will display PCS+ sample value. You can put more articles, the scale will show "PCS XXX", which is quantity of articles.III. Calibration FunctionTurn on the scale, press ON/OFF key 4 seconds, the scale shows 0 then the weight value(if the capacity is 30g, 30.000 will blink) , put 30g calibration weight on it, and shows PASS, then calibration is completed. (20g calibration weight is included with the product, you can press PCS to reduce the weight value to 20g, then put 20g weight to do the calibration), when the calibration value blinks, press UNIT to increase the value and PCS key to reduce the value. According to the amplitude of 10G to increase or reduce, we can select the right calibration weight, the system will remember the last setting operation.IV. Auto power off settingTurn off the scale, press ON/OFF for 4 seconds and shows 88888 and F1-1, Press UNIT to choose the correct power on time(from 0 to 5), 0=do not power off automatically, 1-5 means the scale will power off automatically when no any operation on this time. You man choose the correct time as necessary. The scale can work normally after setting completed. Accessories: 1.20g weightx12.Tweezerx13.Package bagx14.Stainless panx1V. COUTION1. This product is a precision measuring instrument. Please pay attention to operate, do not disassemble by yourself, if there is any problem, contact the after-sale person.2. Place the scale on a solid and flat board without wind and vibration, keep the bubble in the center of the black ring3. Use the scale in windless environment, Please put down the wind shield in windy.4. Keep the scale out of your mobile over 50cm.5. Please do the calibration when the weight environment changed, even if the temperature changes just 1 degree.6. It will display FULL when overload.7. Do not use the product in wet environment. Please remove the battery and keep it in a dry and cool environment when not in use. 8. Do not use corrosive cleaners to wipe the product.