FIFINE Wireless Receiver for K025/K031B/K037/K037B

There are a total of 3 versions of this receiver with a 1/4" connector (which is for plugging into speakers/PAs/audio mixers/interfaces). So please carefully choose the variants of when did you buy the FIFINE wireless system that you're using and whether the highest frequency of the transmitter that you will pair with is below 600MHz.  When you get the correct receiver, you still have to pair it with the FIFINE transmitter that you have already been using. Find the model of yours and follow the tutorial video to pair the new receiver with the old transmitter. K025 from 1:47 to 2:33  K037/K037B from 2:02 to 2:42