IMPORTANT INFO: LAZARTITE M pen is not compatible with all devices. Please check the compatible devices listed in the "Compatible Models" before placing orders. Upgrade to AES2.0 /MPP2.0 protocols: More accurate, smoother, and compatible with more models. Warranty: M pen comes with one-year warranty by repair or replacement after purchg. Works right out of the box: No need for Bluetooth pairing, Apps installation, or power on/off. The active pen automatically activated when touch the laptop screen. Tilt support: Tilt support makes doodling and drawing much easier and more convenient. (Tilt support also depending on a tilt-supporting laptop.). Super Long-lasting: Powered by AAAA battery provides 1000 hours use time (2hrs per day, it can be used around 500 days). No need for gloves: Palm Rejection design allows you to rest your hand on the screen of your laptop, just as you would writing on a notebook. High Sensitivity Stylus: Sketch, Draw and write accurately with 4,096 pressure points, responding to the lightest touch. Feel the artist-level creative experience.