4 different colors of inks in 1 barrel of ballpoint pen, include black, blue, red, green. Push down the color you want, to change color just push it down the other will jump up, suitable for highlighting important parts of text or notes. Rubbery band, grip comfortable while writing. Convenient and portable. Suitable for your wallet, bag or even pocket, keychains can also hang on your bag. Great gifts for students, children, office workers, etc., and good for summer camps.