Widely Compatible: Compatable for Chromebook, including for Chromebook C550-13, Duet Chromebook, 10e Chromebook, etc. 4096 Levels Pressure Sensitivity: This pen is great for drawing and writing and editing, provides an industry-leading 4096 levels of pressure sensitivity for natural writing and sketching. Long Battery Life: This pen for Chromebook can last for 150 days based on 2 hours active use daily. There is no button so this could avoid mistouching (Button function is disabled on current Chrome OS) Protocol: official certification, works with any Chromebook that supports the protocol. Colour:Gray Material:aluminum Package Contents: 1 * Chromebook Pen Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.