The Sennheiser HD 280 Pro is the epitome of boring, utilitarian design; inside and out, there really are no fancy features to speak of. All you do to start up is plug the 3.5mm jack in and you’re ready to go. You might even go wild and use the included 1/4 inch adapter, but that’s really it. The markers to identify which side is left and which is right are only very faintly marked on the inside of the hinges in a tiny font, so you just have to remember that the wire hangs from the left.