This G-Pen F610/F509/F350 tablet pen features 1,024-level pressure sensitivity for authentic, masterful control over all varieties of shapes and brush stroke. Additionally, it has a two button clicker located at the bottom of the pen. As an added bonus, two replacement tips are included just in case you happen to lose the original tip. Lastly, the pen is powered by a single AAA battery designed to provide a long-lasting lifespan. Our G-Pen F610/F509/F350 tablet pen is the only stylus specifically designed for use with the accomplished and highly-competent G-Pen graphics tablet series.