Metal pen body: Adopts anodizing process, beautiful and generous.Plug and play: Equipped with a USB receiver of 2.4GHz RF wireless technology, supporting stable communication.Energy saving and eco-friendly: Built-in 150mAh lithium battery, supporting low power consumption and long battery life.Rich functions: Designed with 5 buttons, including page up and down, electronic laser, one-click annotation, and font color change.