This demonstration is able to operate from either batteries or from an energy harvesting power source. It consumes only about 10% of the current of existing MCUs.

RE01: 1.2mA (using external DCDC) + MIC: 0.5mA. In this video, voice recognition is performed using three different power supply methods, an internal LDO, an external DCDC, and an external DCDC with a solar panel.