Duo lavalier microphone with volume control The Boya BY-DM20 is a duo lavalier microphone, which is suitable for iOS, Android (usb-c), PCs and laptops. You connect the BY-DM20 to your device using the included Lightning cable, USB-C cable or USB-A cable. The two included lavalier microphones can be connected to the BY-DM20 via the 3.5 mm cable. You can adjust the volume for both channels yourself using the rotary knob. There is a button that allows you to switch between stereo or mono, depending on the use of one or two microphones. While recording, you can listen live by connecting headphones or earbuds to the special 3.5 mm output. It is also possible to listen to a recording again afterwards. To do this, play the recording on your device and slide the dedicated button on the BY-DM20 from REC to PLAY. If you want to record a conversation between two people and have good control over the sound, the BY-DM20 is an economical option. There is no wireless connection, so you have to be close to people. Both microphone cables are 1.90 meters long. The volume of both microphones is individually adjustable. You simply clamp the BY-DM20 on clothing with the built-in clamp. The BY-DM20 works on the power of your device (phantom power), no batteries are required.