Product description below (copied and pasted from official storefront).

Note: The 'X800' version of these headphones (other versions are 'P800' or just '800') means it comes with an optical wire (and I think also the extra port on the transmitter) to connect to the Xbox One, and potentially newer Xbox's and other devices with optical in/out but just check that before you buy as I'm not technically minded!

They're really good headphones and very well looked after, but I only used them a handful of times to play on my Xbox One years ago otherwise they've just been on display. The reason I'm selling them is because I switched to PS5 a few years ago and have another pair of Beats headphones that I use for everything else (not as good, but sadly I don't get enough time or peace to utilise these). They can be connected via aux as a normal pair of headphones (tested and works with the Switch/mobiles also), but they're too expensive for being 'on-the-go' so I only ever used them at home.

Unfortunately I bought them for gaming and video editing, and while they're 10/10 for gaming, the wireless function doesn't work with Adobe Premiere Pro (something to do with the Adobe software drivers rather than the headphones though - again I'm not technically minded!) however they worked with Mac and TV if you set up the profiles on the transmitter.

Please note it only comes with one battery (it ships with two) but you can get two for £10 on the Steelseries website. For that I've knocked off £10 from my asking price already.

Everything else is in perfect condition. It's a shame to sell them as they served me well for the brief time that I actually used them, and they are some of the best headphones I've owned, but they're just overkill for my needs right now. 

It's like downsizing from a Jaguar to a Polo because of life!

Description:
Siberia X800 Wireless Gaming Headset provides SteelSeries before a wireless, universal luxury headset, which virtually supports every imaginable platform - from PC and Mac via Xbox One, smartphones and tablets to home theater systems and televisions. For the transmitter box in the SteelSeries Siberia X800 features an array of connectors, among others USB (digital), S / PDIF (optical), and also pawl (analog).

The headset itself is processed enormously wertig, shields his ear pieces excellently on the acoustic environment and feels gentle thanks to the perfectly padded headbands and the leather-like ear pads on each head to. For comfort is moreover ensured by the flexible, also plug-in microphone (with illuminated mute indicator) as well as the ability to adjust volume and other settings directly via an integrated into the earcups control.

Below are the options chosen on the OLED display of the transmitter, a chic black Hochglanzbox that establishes the radio contact between the connected output device and the headset. Of course, all settings can also be made directly at the transmitter. In addition to a 5-band equalizer and Virtual Dolby 7.1 sound here are also three different Dolby audio technologies: Dolby Digital, Dolby Headphone and Dolby Pro Logic llx.

Thus, all kinds of different claims are ideal from SteelSeries Siberia X800 Gaming Headset covered: ambitious players with desire for spatial locating assets, movie lovers who want to be in the middle, and also audiophile music lovers who want to move freely. Great sound in all registers is ensured, because 40 mm neodymium drivers the next generation in the earcups provide a rich frequency coverage with plenty of "punch" in the depth range.

One fast removable lithium-ion batteries enable high operating times and can be recharged directly in the transmitter box, where the charge is indicated. The SteelSeries features "ChatMix" and "LiveMix" help hearing what you want to hear when you want to hear it, as you want to hear it. On the headset itself also a "Sound Share" port is attached, a 3.5-inch phone jack, on which a second handset can connect his player.


Technical details:
    Weight: 318 g
    Color: Black
    Headphones:
    Construction: closed
    Driver size: 40 mm, neodymium magnet
    Frequency response: 20 - 20,000 Hz
    Impedance: 32 ohms Max. Volume: 100 dB SPL @ 1 kHz
    Microphone:
    Position: flexible, retractable
    Frequency response: 100 - 10000 Hz
    Impedance: 2200 ohms
    Sensitivity: -44 dB
    Recording method: unidirectional
    Data transfer: wireless (radio)
    Range: 10 m
    Connections Transmitter:
    Input: USB (mini), S / PDIF optical, 3.5mm analog (4-pole)
    Output: USB (mini), S / PDIF optical, 3.5mm Chat (3-pole)
    Supported Dolby technologies: Dolby Digital, Dolby Pro Logic llx, Dolby Headphone
    Compatibility: PC / Mac (USB port), Xbox One, smartphones, tablets, TVs (with optical outputs, as a headset)