The Boya BY-WM8 Duo Lavalier Pro-K1 is a wireless microphone set with 2 tie clip microphones that yo uconnect to your smartphone, camcorder, SLR or mirrorless camera. This set is suitable for vlogs, video interviews, and presentations. You can clearly record sound, thanks to the UHF frequency that reduces white noise. You can easily bring the microphone set anywhere, thanks to the light weight. The microphones have a range of up to 100 meters if there are no obstacles between transmitter and receiver. This gives you plenty of freedom of movement. Both the transmitter and the receiver use 2 AA batteries. With a full battery, you can record about 6 hours of audio.