The Boya 2.4 GHz Duo lavalier microphone is an affordable wireless transmitter set. Use this set to record sound during presentations, interviews and conversations with an Android device. 

The transmitters and receiver of the WM4 Pro are very compact and connect to each other on the 2.4 GHz frequency. You can easily connect the receiver to an Android smartphone with a USB-C port. You do not need a cable for this, because the receiver of the BY-WM4 Pro-K6 is connected directly to your smartphone. The receiver can also be used with most other devices with a USB-C port such as laptops and tablets. 

Two transmitters with a tie clip microphone are included with this microphone, so you can record the sound of two people at the same time. Optionally, you can adjust the volume with the + and – button. You don't have to set anything up and you can get started right away. The included windshield ensures less wind noise. With the clip, you can attach the microphone capsule to clothing. The range between the transmitter and receiver is up to 60 meters.

The set operates on AAA batteries