Condition 100 Brand New Material Aluminum Color Image Measurement Range 080 Alcohol Minimum Scale 1 Alcohol Automatic Temperature Correction 030 Size About 30 x 40 x 205mm Weight About 240g Package 1 x Alcohol Refractometer 1 x Screwdriver 1 x Wipe Cloth 1 x Storage Case 1. Open the cover and carefully clean prism with a soft cloth 2. Over take detection prisms Put the cover gently close to prevent bubbles that spread across the entire prism surface 3. View the field through the eyepiece directly to the light source or bright place 4. Turn the eyepiece to adjust the handwheel to clear blue and white lines Divided lines are the concentration of the solution Note: 1. Please follow the instructions when using this device to avoid severe impact drops. 2. Clean and soft Use cloth to wipe the device directly into water to clean and avoid surface scratches 3. Store the device in a dry and non-corrosive place 4. Store the parts securely 5. Eyepiece and handwheel adjustment range is within 2cm left and right