4 GHz Wi Fi bandwidth, and you can pair two transmitters to one receiver. Let take a closer look at it! Comica boom X-D SeriesComica is a Chinese company that has been manufacturing affordable microphones since 2012. Now, they have introduced their latest solution for filmmakers: the Comica boom X-D. Like the RODE Wireless Go or the Sennheiser AVX series, the Comica boom X-D series uses the 2. 4 GHz wireless bandwidth, which means they work globally..