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? Why there is no video display on monitor? How to power on the Cosmo C1? What is the AUTO mode? How to upgrade the firmware of Cosmo C1 to V1.0.3.5? Comments 0 comments Article is closed for comments.