How to design object oriented classes representing devices that accept different inputs and outputs?

I'm having trouble finding an optimal object oriented design for the following scenario:

Create an object oriented design for different types of smart devices. Different devices may have different inputs (typing and/or voice), outputs (sound and/or display), and power types (battery or plugged-in). Your design should be able to handle different input and respond to the correct output when asked about its battery status. (e.g.: "50% charged" or "plugged in").

Any ideas on what class hierarchy might be good for this scenario? Any design patterns that are applicable?