The device features a Volume Up/Down rocker on the left side.

On the left below the volume keys there is a dedicated hardware button for Bixby (voice assistant) functions.

On the right side there is the Power / Side key:

• Press once to wake or lock the screen. 

• Press and hold to turn the phone on (if off) or to access advanced options.

• A combination of Side key + Volume Down takes a screenshot.

These side buttons are replaceable components—common replacement parts include power/side key sets and volume rocker key sets for repair of Note 8 units that have been damaged.