BOYA BY-LM400 Dual-Lavalier Microphone for Mobile

BOYA BY-LM400 Dual-Lavalier Microphone for Mobile
Regular price 140.00


Featuring two lavalier microphones, the Boya BY-LM400 is designed to improve the quality of your audio when recording two-people interviews on mobile devices such as iPhones, iPads, iPods, and most Android devices. Easy to use with no battery required, it helps you create clear and intelligible audio or audio/video recordings on the go, whether you're working on VLOGs, podcasts, Instagram/Twitter/Facebook/Snapchat posts, or doing mobile journalism.

The BY-LM400's lavalier mics are connected via a 13' Y-cable, which is terminated with a 3.5mm TRRS connector. Quickly plug the connector into the headphones output on your device and you're ready to start recording. The microphones feature omnidirectional polar patterns to ensure that the sound of the voices remains consistent even when the persons who are being interviewed move their heads.

The included mic clips allow you to conveniently mount the microphones on shirts and jackets so you can position them closer to the speakers' mouths than possible with a camera mic, thus improving the quality of your recordings.

The BY-LM400 ships with two foam windscreens, and a carrying pouch.


Record Two-People Interviews with iOS and Most Android Devices

  • Set of two lavalier microphones for creating quality recordings of two-people interviews on the go
  • Includes two lavalier microphones connected via a 13' Y-cable
  • 5mm TRRS connector plugs into the headphones output of iPhone, iPad, iPod, and most Android devices
  • Use for mobile journalism, Instagram/Twitter/Facebook/Snapchat posts, YouTube videos, VLOGs, podcasts, and more
  • Easy to use with plug-and-play functionality
  • Omnidirectional polar pattern keeps the sound of your voice unchanged, even when you move your head
  • Mics conveniently clip to your shirt 
  • No battery required
  • Includes mic clips and foam windscreens
  • Includes carrying pouch
Technical Specs


Polar Pattern



Frequency Range

35 Hz to 18 kHz


-30 dB at 1 kHz

Signal-to-Noise Ratio

74 dB


Output Connectors

1 x 1/8" / 3.5 mm TRRS

Cable Length

13' / 4 m (Mic 1)
13' / 4 m (Mic 2)



1.7 oz / 50 g