Two power options: USB direct charging or 4 AA batteries. Two power modes are available. It is compact, flexible and practical. It can be vacuumed automatically at the touch of a button. Multi-Function: Can draw the compression bag of clothes, can inflate the sphere, travel tent, swimming ring, etc. Efficient: A powerful electric air pump is easier than a manual pump and sucks air out of the vacuum bag faster. Reusable: The vacuum bag is easy to clean with detergents and warm water, then store it in a clean and dry place, which can be reused multiple times.