If you're not getting any audio input or output, check the following settings:

• In the latest version of Windows, there are new permissions that have to be enabled for the mic to properly communicate with your computer. Navigate to Settings → Privacy → Microphone and make sure that the mic is enabled for use on everything.
• Open the Sound Control Panel menu, then
  1. Select Recording Devices.
  2. Right-click on your Blue Mic and select Properties.
  3. Under the Levels tab, move the fader to 80-100.
  4. Select Playback Devices.
  5. Right click on your Blue Mic and select Properties.
  6. Under the Levels tab, move the unmuted faders to 50-60.
• Under Recording Devices and Playback Devices, make sure that Yeti X World of Warcraft Edition mic is the only default device and that all other devices like headsets or webcams are disabled or unplugged.
• There is a BLEND Mode on the Yeti X World of Warcraft Edition mic that adjusts the amount of computer audio versus microphone audio that is heard in the headphones. To access BLEND Mode, hold down the button below the Blue logo until the HEADPHONE and MICROPHONE LEDs are both on. Make sure that the meter is set to center - meaning that only the 12 o'clock LED should be on.
• Check if a signal is being read by your computer by tapping or speaking into the mic.

With these settings, you will be hearing all computer audio and direct monitoring through the bottom headphone jack of the mic.