Good Gear Guide
A closer look at the Sony PS4 and DualShock 4 cont...
On the top of the DualShock 4 controller is a light bar able that can display different colours. It's primarily used to identify different players for local based multiplayer games but there's no way to switch it off if you're not fond of it.
A closer look at the Sony PS4 and DualShock 4 controller