Navplus Art 3D Stereoscopic Printing Pen Printer For 3D Drawing + Power Adapter + 3 Free Filaments (Blue) 3D Pen for freehand drawing of 3D objects. Ergonomic design for optimal handling; intelligence standby, extending the service life of the spring. Lightweight and stepless speed design, draw on paper or in thin air, or trace and connect to create 3D masterpieces. Integrated and compact design, electric heating nozzle is for maintenance and replacement.Adjustable variable speed by single hand, easy to use. This pen replaces ink with plastic which melted at a high temperature to create a 3D object instead of just an idea on paper. It can be used to draw in the air or on surface as well as tracing objects on paper.Prolonged use doesn't cause FLAC fatigue.