17 liters.

The minimum size of a "mini microwave" is 17 liters. The "mini microwave" is smaller than a traditional microwave, saving space and making it easy to place. Light weight, easy to carry, can be used anytime and anywhere. "Mini microwave oven" is a small household appliance that is convenient, practical, energy-saving and environmentally friendly, and is suitable for use in places with limited space such as homes or offices.