Typical features include:
Power — turn the TV on/off
Navigation buttons — Up/Down/Left/Right and OK/Enter
Home — access the Smart TV home screen
Back/Return — go to the previous screen
Volume + / − — adjust sound
Channel + / − — change channels
Mute — silence the TV
Number buttons — enter channels/numbers
Menu/Settings — access TV settings
Source/Input — switch between HDMI, AV, TV, USB,