This small adapter will convert your SM58 (or any microphone) into a USB recording device. Switchable phantom power allows you to even use a condenser microphone (ie. STM-1300) on your laptop or desktop computer. There"s also a Gain Control for the microphone signal and an output for headphones with volume control. USB Power cord included. (*Pictured below with MacBook Pro, not included.)Convert any microphone to a USB Microphone with this amazing cool new adapter.FeaturesStandard XLR Female ConnectionMini USB connectionSwitchable 48V Phantom PowerMic Gain Control KnobHeadphone OutputVolume Control for HeadphonesPerfect For:Home RecordingVocals and Musical InstrumentsVoice OversPodcastingGeneral Multi-Media Purposes