2 Recording Patterns Cardioid and Omni-directional. For different application you can choose one of them. Cardioid mode mostly use for Vocal recording , omnidirectional mode for video conference or for meeting applications. RealTime Monitoring The Thronmax MDrill Dome comes equipped with a 3.5-millimeter headphone jack and allows you to listen to what you’re recording in real-time, without latency delays. You can adjust the volume of your headphones using a control on the front of the microphone.