That depends on the headset and your device. A 3.5 mm jack provides a simple analogue connection, while USB headsets may support additional features such as equalizers or virtual surround sound, depending on the model.

Yes, as long as your PC supports the required connection. With 3.5 mm headsets, check whether the headphones and microphone use a single combined connection or two separate jacks.

This depends on the headset and console. Before buying, check which connections are supported and whether the model is compatible with your console.

No. Wired gaming headsets do not require a battery for normal use because the connection is established directly via cable.

A splitter may be required if your headset uses a combined 3.5 mm connection for headphones and microphone, while your PC provides two separate audio jacks.

The ideal cable length depends on your setup. It should be long enough to comfortably reach your PC or console without leaving unnecessary excess cable on your desk.