The SCOPE NODE M-SN1UL incorporates a laser sensor capable of achieving a higher recognition rate in low-contrast situations than that of a conventional optical mouse. The sensor can pick up subtle movement of the mouse and accurately translate the movement into the cursor movement. The SCOPE NODE is also characterized by its laser sensor position aligned to that of the pen tip, so that the sensor's high-resolution performance (1,600 dpi) can be accurately represented on the screen. In short, you can use "a PC monitor and a mouse" just like "a piece of paper and a pen" because you can use the mouse just "like you're holding a pen!" for writing or drawing.