it sounds like the E-8150 Gaming Headphone may have two 3.5mm audio jacks (one for audio output and one for microphone input) and requires USB power, possibly for features like LED lighting or additional functionality.

Here's a breakdown of what each component might typically be used for:

1. Double Jacks: The dual 3.5mm audio jacks are commonly used for audio output (headphone/speaker) and microphone input. This configuration is often found in headsets designed for PCs or laptops with separate audio and microphone ports.

2. USB Power: The USB power connection may be used to power additional features of the headset, such as LED lighting, active noise cancellation, or built-in amplifiers for enhanced audio quality. Alternatively, it might be used to enable features like virtual surround sound or provide power for an onboard sound card.