The NELKO Label Maker Machine (Model P21) is a portable Bluetooth label printer designed for small businesses, schools, and offices. It prints in black and white using thermal print technology at a maximum speed of 30.00 Max Printspeed Monochrome. This all-in-one label maker is compatible with smartphones (iPhone, iOS & Android) and offers dual-sided printing with automatic duplex capability. It includes a Type C charging cord and supports various sheet sizes for versatile labeling options.