ALUMINIUM ALLOY: This for IdeaPad stylus in light weight and proper size adopts aluminium alloy which is not easy to deform. Equipped with ultra wear resistant tip, and it won't scratch the screen. 4096 PRESSURE: This for Duet 5 stylus adopts professional 4096 pressure that ensure accurate drawing and coloring with quick response. ANTI INTERFERENCE: This for ThinkPad stylus pen without delay features palm rejection and strong anti interference, providing accurate control. PREFERENCE STORAGE: This for Duet pen will storage users' preference to make sure seamless connection on different devices. Powered by 1 AAAA battery(not included), about 6 months' standby time. STRONG COMPATIBILITY: This tablet stylus is suitable for Chromebooks Tablet, for Chromebooks Duet, for ideaPad Duet 5, for ThinkPad, etc.