Notion only has one power button. To turn Notion on, press and hold the power button for two (2) seconds.
With Notion 2, press and hold the power button for six (6) seconds to shut the device down.
To turn Notion 1 off, press and hold the power button for two (2) seconds for a safe shut down, which will occur about 30 seconds later. To perform a hard shut down, hold the power button for five (5) seconds. It's recommended to perform safe shutdowns instead of hard shutdowns.
If you wish to charge your Notion, we recommend powering down Notion and plugging it into the included USB cable. View the charge amount in the Console. Notion will automatically enter sleep mode while charging, where no brainwave data is read in. Notion indicates sleep mode via flashing it's LED status light.