Cosmo C1 Frequency Chart Hollyland Tech November 04, 2022 07:02 Related articles How to set them up when mutiple sets of Cosmo C1 are used at the same place? How to upgrade the firmware of Cosmo C1 to V188.8.131.52? What is the AUTO mode? Why there is no video display on monitor? Syscom 421 Frequency Chart Comments 0 comments Article is closed for comments.