The Niimbot B21 uses thermal printing technology, which saves the need for ink. It burns what you chose to print on a label (sticker) adapted to this technology.
Although the print quality is not completely professional, the labels are clear and readable. The print speed is excellent and the paper quality is great. The connection to the smartphone takes a few seconds after pressing the activation button. Within the app you can use built-in label templates/wallah! Technology, Yanon Ben Shoshan.