2 ink colors in 1: Twist the barrel one direction for black ink and twist it back in the other direction for red ink. No need to keep swapping between 2 different pens to mark up those papers.
2 tools in 1: A premium stylus on one end and a premium pen on the other means you no longer need to carry around each separately, allowing you to switch seamlessly from your tablet or smartphone to paper.
Compatibility: Compatible with any capacitive touchscreen, including all versions of the iPad (1, 2, 3, 4, Air, Air 2, Mini, Mini Retina), iPhone (3, 3G, 4, 4S, 4G, 5, 5S, 6, 6 Plus, 6S, 6S Plus) as well as any other Android touchscreen tablet or smartphone. Use with the Samsung Galaxy Tab line, ASUS Transformer Prime/Infinity line, Nexus devices, E-Reader Touchscreen Tablets, and many more.
Precision Stylus tip: Replaceable screw-on smooth glide micro-fiber knit tip. Standard stylus tip diameter of 8 mm responds well on all capacitive touchscreens.
Size: 14 cm long, 8.7 mm barrel diameter
Twist the barrel one direction and you'll get red ink, twist it back in the other direction and you'll get the black ink! Replacement stylus nubs can be screwed off and replaced with the 8 mm diameter tip.
Replacement Ink: To replace the ink, simply pull the pen apart and then lightly pull the ink out of it's respective holder. Firmly push the replacement ink in the holder once the old one is removed.
Replacement Stylus Tips: Screw off the stylus tip and screw on the new one. Easy as that!