How do I switch off the Tobii Pro Glasses 2 Recording Unit?

To switch off the Tobii Pro Glasses 2 Recording Unit you need to press and hold the touch sensitive power button as long as the indicator LED's are blinking. 

This is a feature to avoid switching off the unit accidentally. When the indicator LED's turn permanent green again you can release the power button and it will save ongoing recordings and switch off automatically. You can find more information in the Tobii Pro Glasses 2 manual.