The electric balloon pump is mainly made of Polypropylene, a strong plastic. This balloon pump is upgraded from the old version. Balloons can be knotted directly on the pump, after the inflation is completed. It will release your hands and prevent sore of fingers. The electric balloon pump will save time and make the assemble faster and simpler. It's easy to use and quick to tie up. This electric balloon Pump Inflator has advanced wire storage (when not in use, you can store the wire to avoid being damaged) and automatic protection device: When the pump is unattended for long time, the pump will automatically disconnect the power supply. It's great choice for the party, festival, wedding, celebration and decoration.