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Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System

BH #HOHLCOSMOC1 • MFR #HL-COSMO C1
Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System
Key Features
  • Wireless Video Transmitter/Receiver Set
  • Transmitter HDMI/SDI Input, SDI Loop Out
  • Receiver HDMI & 2 x SDI Outputs
  • OLED Screen, USB Type-C Power Input
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 up to 1000' to a single receiver, allowing flexible video monitoring and distribution for your studio or field production. This kit consists of a transmitter and a receiver that communicate over the 5.1 to 5.9 GHz wireless frequency range.
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Hollyland Cosmo C1 Overview

  • 1Description
  • 2High-Definition Video Transmission
  • 3Solid, Secure Wireless Transmission
  • 4Live Video Input/Output
  • 5Input/Output Transmission Formats
  • 6Versatile Power and Form Factor
  • 7Multiple Mounting Methods
  • 8Auto Fan Mode
  • 9Low-Battery Indicator
By B&H Photo's
High-Definition Video Transmission
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 up to 1000' to a single receiver, allowing flexible video monitoring and distribution for your studio or field production. This kit consists of a transmitter and a receiver that communicate over the 5.1 to 5.9 GHz wireless frequency range.
Solid, Secure Wireless Transmission
The Cosmo C1 can transmit video up to 1000' line-of-sight with a low 40 ms latency using the HEVC/H.265 codec. The system operates on the 5 GHz frequency band and uses AES-128 encryption to prevent video leakage. It also supports smart channel selection, allowing the system to choose the cleanest channel for transmission as well as HEVO, an adaptive frequency hopping technology, for seamless retransmission without losing a frame.
Live Video Input/Output
  • The transmitter offers one HDMI input, one SDI input, and one SDI loop-through output, and the receiver offers two SDI outputs and one HDMI output.
  • The receiver can also be used for live streaming via its USB Type-C output, supporting UVC applications on your Internet-connected computer.
Input/Output Transmission Formats
Versatile Power and Form Factor
  • Both compact units also feature a bright, easy-to-read OLED display showing status and configuration
  • Each unit can be powered via an L-series battery plate, DC input, or with an optional USB power supply via the USB Type-C port
  • Four standard antennas and two mushroom antennas are supplied for the receiver and transmitter
  • Each unit is easy to mount just about anywhere using its 1/4"-20 threads and included shoe mount adapter
Multiple Mounting Methods
You can mount the transmitter and receiver using the cold shoe on the front panel for horizontal mounting, and you can utilize the 1/4"-20 thread to mount the unit on a tripod or cage.
Auto Fan Mode
The COSMO C1 can adjust the fan speed according to the device's temperature, and it is so quiet it is hardly felt or heard.
Low-Battery Indicator
Both the Cosmo C1 transmitter and receiver have a low-battery indicator above the LCD on the side. Once the indicator shows red, the device will run out of battery in 20 minutes, so you have plenty of time to replace the battery or connect to a power source.

Hollyland Cosmo C1 Specs

Key Specs
Video I/O
Transmitter: 1x BNC (3G-SDI) Input
Transmitter: 1x HDMI Input
Transmitter: 1x BNC (3G-SDI) Loop Output
Receiver: 2x BNC (3G-SDI) Output
Receiver: 1x HDMI Output
Embedded Audio
HDMI/SDI: 2-Channel
Latency
40 ms
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
Battery Type
Transmitter/Receiver: 1x L-Series
Power Consumption
Transmitter/Receiver: 9 W
Mounting
1x Cold Shoe
Inputs / Outputs
Antenna I/O
Transmitter/Receiver: 2x RP-SMA Male
Video I/O
Transmitter: 1x BNC (3G-SDI) Input
Transmitter: 1x HDMI Input
Transmitter: 1x BNC (3G-SDI) Loop Output
Receiver: 2x BNC (3G-SDI) Output
Receiver: 1x HDMI Output
HDCP Support
Not Specified by Manufacturer
Embedded Audio
HDMI/SDI: 2-Channel
Audio I/O
No
Power I/O
Transmitter/Receiver: 1x USB-C (2 A / 5 VDC) Input
Other I/O
Transmitter/Receiver: 1x USB-C 3.0 / 3.1/3.2 Gen 1 Input
Encryption
128-Bit AES
Wireless
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
Bluetooth
No
Cellular Support
No
Format Support
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
Power
DC Input Power
6 to 16 VDC
Battery Type
Transmitter/Receiver: 1x L-Series
Power Consumption
Transmitter/Receiver: 9 W
Mounting
Mounting
1x Cold Shoe
Environmental
Environmental Protection
No
General
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
Packaging Info
Package Weight
4.39 lb
Box Dimensions (LxWxH)
11.6 x 10.8 x 5.5"

Hollyland Cosmo C1 Reviews

See any errors on this page? Let us know

How many sets can be used simultaneously on a ...

How many sets can be used simultaneously on a switcher?
Asked by: JUN
If you think of the Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System as the cable from the camera, you can use as many as you have camera inputs on the switcher.
Answered by: Dennis L
Date published: 2022-06-23

Does this work with the Mars M1 Enhanced Monitor?

Does this work with the Mars M1 Enhanced Monitor?
Asked by: Jason
No, the Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System is not compatible with the Hollyland Mars M1 Enhanced Monitor, however it is compatible with Mars Pro series and Mars 4K video transmission systems. You can also use another Mars M1 enhanced. Hollyland Mars 4K Wireless Video Transmission System BH #HOMARS4K Hollyland Mars 400S PRO SDI/HDMI Wireless Video Transmission System BH #HOMARS400SPR Hollyland Mars M1 Enhanced 5.5" Wireless Transceiver Monitor BH #HOHLMARSM1E
Answered by: Chris H
Date published: 2024-02-29

I know that Hollyland claim this unit works ...

I know that Hollyland claim this unit works around 40ms latency but will Cosmo improve latency response for focus pulling under a full sdi solution?
Asked by: Patricio
The Hollyland Cosmo C1 will have 40ms latency at its best when using HDMI or SDI.
Answered by: Peterm
Date published: 2022-06-23

Is there a way to change the dropped signal image ...

Is there a way to change the dropped signal image to something besides the Hollyland logo?
Asked by: Mike
No, the symbols on the Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System's display are not changeable.
Answered by: Paige K
Date published: 2022-10-26

, how many devices (tablets, iPhone, ipad, etc) ...

, how many devices (tablets, iPhone, ipad, etc) can be sed for monitoring the live feed ? thanks
Asked by: M
One. The Cosmo C1 can only support 1 Transmitter to 1 Receiver, doesn't support connect via APP
Answered by: hectorm
Date published: 2022-08-05

Will the COSMO C1 cross convert the HDMI in on ...

Will the COSMO C1 cross convert the HDMI in on the transmitter to the SDI out on the receiver? Looking to feed my HDMI on my Z9 to a SDI monitor.
Asked by: Jay
Yes, You will be able to cross convert like that on the Hollyland Cosmo C1 TX/RX.
Answered by: Peterm
Date published: 2022-04-04

so each camera during live streaming has to have ...

so each camera during live streaming has to have one Cosmo C1 each? Normally live stream has multiple cams.
Asked by: Ransom
The Hollyland Cosmo C1 is a 1 to 1 system. Each camera must transmit to a receiver on the other end.
Answered by: Jonathan S
Date published: 2023-09-21

Does the C1 transmit audio with the video feed?

Does the C1 transmit audio with the video feed?
Asked by: MH
Yes, the Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System does transmit audio and video.
Answered by: Paige K
Date published: 2022-06-19
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