The BOYA BY-LM40 is a high-quality omnidirectional USB clip-on lavalier microphone for your computer. Featuring an USB-A output connector, the BY-LM40 can be connected to Macs and Windows computers with a USB-A interface. And its omnidirectional capsule picks up and delivers the warm sound to your computer through the 4m (13ft) audio cable. No need any procedures to drive or external batteries to power it, users can plug it into computers and get started.