WIDELY COMPATIBLE - The Penoval USI pen is compatible with Lenovo Duet 3 / IdeaPad Duet 3 Chromebook (11", 7), Duet / IdeaPad Duet Chromebook, Duet 5 / IdeaPad Duet 5 Chromebook (13”, 6), HP Chromebook x360 14c, Acer Chromebook Spin 713 (CP713-2W, CP713-3W), ASUS Chromebook Flip C436, Samsung Galaxy Chromebook 2. Supports both USI1.0 and 2.0 protocols. ***Please check your devices before placing an order; a list of compatible devices is shown in the product images. TYPE-C FAST CHARGING & ALUMINUM ALLOY - Compared to the previous version of USI, this recharging model makes it more environmentally friendly & reusable. Up to 90 hours of usage time when you charge it for 50 mins. The stylus pen is made of aluminum alloy, making it sturdy and long-lasting. MAGNETIC ABSORPTION & PALM REJECTION TECHNOLOGY - Using our stylus, you can write or draw smoothly having your palm on the touch screen and never worry about leaving any stray marks. ***Note : Not all chromebooks support magnetic absorption. STURDY CONE-LIKE TIP - Our unique cone-like design solves an annoying problem for most users — unstable writing. Our stylus pen is also wear-resistant and easy to replace if you break it. Overall, it is a more streamlined design for users. 4096 PRESSURE POINTS - Use our stylus pen for touch screens to precisely sketch and shade with 4,096 pressure points that respond to the lightest touch. Create your masterpiece with high accuracy and great details. ***What's in the box? 1x USI2.0 Pencil, 1x Replacement Nib, 1x Type-C Cable, and a User Manual.