This series of models are controlled by transistor circuits, featuring simple operation and easy mobility. It is mainly applicable to non-continuous medium and small batch sealing operations, and is particularly suitable for sealing objects that are not easy to move. It is not suitable for long-term use in harsh environments with heavy acidity or alkalinity, high humidity and a lot of dust. This machine is a special type of sleeve induction model, mainly used for sealing small-diameter special-shaped bottle caps with suction nozzles or flip caps within the above-mentioned diameter color range, where there is a certain gap distance between the bottle cap surface and the induction film.