[Battery -free Stylus]--The pen adopts the most advanced passive technology at present, no need to charge or replace the battery. It's always ready whenever you want to create art,avoiding trouble of battery leakage and low power. [8192 Levels Pen Pressure]-- 8192 levels pressure sensitivity helps you to draw thicker or thinner lines depending on how hard you push on the pen. It makes lines smoother and more natural. Allowing you to capture ideas faster and easier.