Whether you’re filming a youtube video or if you’re filming an interview, the quality of your audio is as important if not more important than the video quality.The audio of the video for this review is entirely recorded on the K&F concept M8 wireless lav mic. At this price, this is considered a budget wireless option when you compare it to other brands. But that being said, the audio quality is still perfect for YouTube or other purposes.In the box, you’ll get 2 units, a transmitter, and a receiver, they look almost identical, except for the jack at the top. One says Mic and the other says Out. Each unit takes 2 double AA batteries (you should consider buying rechargeable ones), both units have a belt clip at the back and under the battery cover, you’ll find a channel button to choose between 6 different frequencies.This is great if you're outdoors and got any interference, you can switch channels to find something clean.The receiver unit has a volume button to control the level of the audio. I kept the volume at 1 for this video and adjusted the volume settings on my camera instead. There is also a hot shoe adapter that snaps onto the belt clip and allows you to mount the receiver unit on your camera.You also get 2 different microphones, one with a cord to clip on your shirt and another short mic that plugs in directly into the unit for using the whole unit as a handheld mic for one on one interviews.Overall, I am impressed with this unit and with K&F Concept's products in general. You're getting great value and quality for great prices without breaking the bank.