1. Fast speed and strong power, suitable for shading and lining. Connected through a DC line.

2. Integrated pen structure, replacing the needle and adjusting the length of the needle, simple and convenient;

3. DC interface - alloy protective layer, tightly connected and more wear-resistant;

4. New hand slip and anti slip design, comfortable grip, good hand feel, and not tiring after long-term use;

5.All ink cartridges can be used