Aige q78 square dance audio can be used at the same time two wireless microphone?

Square dance audio in the purchase of the time if you buy is to support the dual microphone board audio, then you can use two different frequency points at the same time, the general purchase of this audio are configured with two wireless microphone; if you buy a single microphone board, can only support the use of a frequency point of the wireless microphone, the general purchase of the time to buy only a frequency point of the wireless microphone.