Turtle Beach is pitching the PX4 as the first set of wireless gaming headphones to support the PS4, which in and of itself will have some people sold.
The first main part of this headset is a wireless transmitter that hooks into an optical or analog audio out, and uses a USB port for power. This then connects via dual band wireless to the headset itself, which supports simulated Dolby surround sound. It can also connect to bluetooth devices like your smartphone, or via an analog cable, and is charged by USB.
This all works alright, and the audio quality is decent, if a little underwhelming when compared to cheaper solutions like Plantronics Rig, which lacks the wireless functions but has more comprehensive connectivity. Unless you absolutely need something better than the default PS4 headset, then these fall just short of greatness.