This is an awesome wireless microphone by K&F concept. I also have a lavalier but with a cord, with this microphone I will be truly wireless which is awesome if you want to move around or want to hide your microphone. The distance is really good, I have not tried the maximum distance of 20 meters yet but so far with my camera in one place on the first floor and me testing around in the house, in the basement, it worked really well. The quality is also really good, you can change the volume of the audio input also.Using this set of microphone was pretty easy, they also do provide a really good manual in case you have never used such thing. Basically it comes with a transmitter and a receiver (both has 2 AA batteries each included), the transmitter will have the socket for the microphone and the receiver will be connected to your camera audio mic socket.On the transmitter set, you have a mic input to connect one of the two microphones provided. One microphone has a wire for you to run it from the transmitter that could be attached on your belt and clip the microphone on your clothes so you can have your hands free and be a little more subtle. The other microphone is directly plugged in the mic input of the transmitter set so you can hold the transmitter and use it as a microphone to interview people. To quickly differentiate the transmitter from the receiver since they are identical, you have to look for the input socket. The transmitter has the socket for MIC while the receiver has the socket for OUT.There are severals features with this set, you can change channels if you hear interference (up to 6 different channels), you can lower or higher the volume, they use two LCD screens that show the battery level, the volume level and the channel used. It also comes with a hot-shoe mount/boot type to set your receiver on top of your camera.