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Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System


The Cosmo C1 SDI/HDMI Wireless Video Transmission System from Hollyland allows you to wirelessly transmit high-resolution video up to 1080p60 over long distances, allowing flexible video monitoring and distribution for your studio or field production. This kit consists of a transmitter and a receiver.


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This new member to the COSMO series, transformed by Hollyland's HEVO wireless transmission tech- nology, offers a new standard for real-time video monitoring up to 1,000ft line-of-sight. Boosted signal strength and superior anti-interference capability in the 5.1GHz-5.8GHz frequency spectrum guarantee buttery-smooth video transmission in complex environments. Industry-first to integrate UVC (USB Video Class) interface, COSMO C1 offers a whole simplified solution to stream and cloud-share your video works.

It's the new go-to choice to step up your content production teams to the next level.

Channel Switching, You'll Never Feel It

HEVO completes each synchronous frequency hopping in 0.001s at both receiving and transmitting ends that ensures picture integrity at the instant of frequency switching. Whether on manual or auto-switching mode, your live streaming and production monitoring will no longer suffer black screens.

All You Need Is A USB-C Cable

With HEVO, UVC is embedded in COSMO C1. It simply takes one USB-C cable to pass 1080P60 HD video to our computer for direct live streaming. No video capture device needed, no addi-tional settings. It iust works!

A Silver Bullet For Focus Puller

HEVO, based on Hollyland's self-developed protocol, improves coding efficiency by 30% with H.265 (HEVC). The acceleration module embedded in COSMO C1 achieves an ultra-low latency as low as 40ms. There is no compromise on image output and transmission latency within the 1,000ft LOS range. 300M

HDMI&SDI In/Out + SDI Loopout

COSMO C1 allows HDMI & SDI connections on both the TX and RX unit. plus an SDI loopout on the TX. It can work with an mainstream camera, monitor, or switcher you happen to work on. Your deal search ends here, period.

Antenna Ports Transmitter/Receiver: 2 x RP-SMA Male
Transmitter 1 x BNC (3G-SDI) Input
Transmitter 1 x HDMI Type A Input
Transmitter 1 x BNC (3G-SDI) Loop Output
Receiver 2 x BNC (3G-SDI) Output
Receiver 1 x HDMI Type A Output
HDCP Support Not Specified by Manufacturer
Embedded Audio HDMI/SDI: 2-Channel
Audio None
Power Transmitter/Receiver: 1 x USB Type-C (2 A / 5 VDC) Input
Other I/O Transmitter/Receiver: 1 x USB 3.1 / USB 3.2 Gen 1 (USB Type-C) Input
Encryption 128-Bit AES
Wireless Range 1000' / 304.8 m
Channel Bandwidth 20 MHz
Frequency Range US: 5.1 to 5.8 GHz
Latency 40 ms
RF Power 22 dBm
RF Sensitivity -80 dBm
Wi-Fi Yes
Video Format
HDMI 1080p: 60/59.94/50/30/29.97/25/24/23.98
1080i: 60/59.94/50
720p: 60/59.94/50
576p: 50
480p: 60
SDI 1080p: 60/59.94/50/30/29.97/25/24/23.98
1080PsF: 25/24/23.98
1080i: 60/59.94/50
720p: 60/59.94/50
Audio Format Not Specified by Manufacturer
Timecode Support Yes
DC Input Power 6 to 16 VDC
Battery Type Transmitter/Receiver: 1 x L-Series
Power Consumption Transmitter/Receiver: 9 W
Mounting 1 x Cold Shoe
IP Rating None
Dimensions Transmitter/Receiver: 4.5 x 2.8 x 1.3" / 115 x 70 x 32 mm, Excluding Battery Plate
Weight Transmitter: 7.5 oz / 214 g, Excluding Antenna
Receiver: 7.4 oz / 210 g, Excluding Antenna