"Perfect Compatibility: Compatible with for HP Spectre x360, for ENVY X360, for Pavilion X360 laptops and supports Windows Ink and for compatible with Microsoft Pen Protocol MPP2.0 for more natural writing and drawing. 4096 Levels of Pressure Sensitivity The highly sensitive Tilt Pen supports MPP with 4096 levels of pressure sensitivity for smooth writing, giving a natural feel like writing on paper. Presentation Function: Press and hold the B button and then press the A button to switch between handwriting mode and presentation mode. The stylus must be connected to the computer via for Bluetooth-compatible in order to use this function. for Bluetooth-compatible Connectivity: The pen supports for Bluetooth-compatible and is easily activated with a single button that also acts as an end eraser, compatible with Windows Ink, driving content, creativity and drawing forward. Fast Charging: The Tilt Pen supports fast charging and only takes about an hour to fully charge, with a long battery life that allows your creativity to extend indefinitely. "