Product details of Audew 8 Colors LED Writing Board Pens Highlighter Fluorescent Liquid Chalk Marker 6mm (Intl)Specifications 1.Size: 135 x 15mm Line width: 6mm 2.Color: Yellow, Green, Red, Blue, White, Pink, Orange, Purple 3.Nib has 2 sides: Chisel side and Bullet Point side Just pull it out to change it around depending on your needs 4.Applications: Can be used for advertising boards How to use Shake well with cap on and up-right remove cap Press tip for a few seconds until tip fills with ink Write anything you want on the LED writing board Recap tightly after use and store in horizontal position Caution Prohibit the use of children under the age of three. Please do not put on the high temperature and flame edge. Please note: This fluorescent pen can be used as chalk to write on the board,however,it may not display its color well. It will display the color when writing on the light-boards.