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Hollyland Cosmo C1 [Official] 1000ft Wireless HDMI/SDI Video Transmission System 40ms 1080P 12-20Mbps 5G Image&Audio Transmitter Receiver, Embedded UVC Live Stream Seamless Channel Switch SDI-Loopout

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$549.00

$ 99 .00 $99.00

In Stock

About this item

  • [Wireless Video Transmission Revolution] - COSMO C1 is equipped with Hollyland’s HEVO technology with Adaptive Frequency Hopping (AFH), Seamless Retransmitting and Simplified UVC Streaming, bringing you boosted signal strength and superior Anti-Interference performance. Fast, stable and smart video transmission in 5GHz frequency.
  • [Unnoticeable Channel Switching] - HEVO completes each synchronous frequency hopping in 0.001s with only 40ms ultra-low latency and up to 1,000ft line of sight (LOS) range. Whether in manual or auto-switching mode, your Electronic Field Production monitoring will no longer suffer from screen flickering or black screens in complex wireless environments.
  • [Wide Range Device Compatibility] - Embedded with HEVO’s USB Video Capture (UVC) technology, it takes just one USB-C cable to push 1080P60 HD video to your computer for direct live streaming. COSMO C1 supports HDMI/SDI input, HDMI+SDI+UVC Output on RX, and SDI LOOPOUT on TX. It can work with any mainstream camera, monitor, and switcher.
  • [Vertical & Horizontal Mounting] - COSMO C1 comes with 1 Peasecod Pan-tilt with Cold Shoe and 1 extra Cold Shoe for you to mount freely. 2 mounting holes at the front panel allows installing the unit horizontally, ideal for evening out the weight to balance the setup on camera and stabilizer, while the 1/4"-20 threaded hole can mount the unit on any tripods.
  • [3 Power Supply Options] - As usual, COSMO C1 guarantees that you have nonstop power supply for different shooting scenarios. DC power supply is more suitable for indoor project, while L-series battery [NPF970/NPF750/NPF550] and USB-C port are perfect for your run and gun missions. Power indicator on screen and LED light in red reminds you 20 minutes in advance of a dying battery.
  • [Warm Notice] - COSMO C1 supports 1 TX to 1 RX. TX supports HDMI or SDI video input from 1 camera. C1 has 8 frequency channels and supports up to 4 sets working at the same place. Under AUTO channel scan mode, it will switch channels automatically when there is interference. TX’s loopout function only works when input is from SDI port, not HDMI.



Product Description

Hollyland Cosmo C1 Wireless HDMI & SDI Transmitter Receiver Set

Cosmo C1

The Cosmo C1 is transformed by Hollyland's HEVO wireless transmission technology, offers a new standard for real-time video monitoring up to 1,000ft line-of-sight. Industry-first to integrate UVC (USB Video Class) interface COSMO C1 offers a whole simplified solution.

Packing List

  • Transmitter *1+ Receiver *1
  • Hard Plastic Case *1
  • Radio antenna *4 + Mushroom shape antenna *2
  • Hot shoe *1 + Cold Shoe *1 + Type-C OTG Converter *1
  • DC Power adapter *1 + Extension accessories *1
Hollyland Cosmo C1
Hollyland Cosmo C1
  • UVC: USB Video Capture, is a pretty nice technology in live broadcast.

    Note:

    1. UVC only support 1080P video output now

    2. Please set the video format to 1080P on OBS when you add the video capture device.

  • There are 3 ways to power the Cosmo C1:

    1. DC adapter (6~16V)

    2. NPF batteries -[NPF970/NPF750/NPF550]

    3. Type-C (5V/2A) (But please don't use it in the working time)

  • Please move the thumbwheel button up and down to change the channel number, the AUTO options are between channels 1 and 8.

    In the AUTO mode, our device will change the channel to a clean one automatically when there exists interference.


Isaac Ramos
2025-08-20 18:35:07
Perfecto
luigi
2025-08-14 13:53:48
The media could not be loaded.
J. Foulke
2025-08-02 11:53:55
I’ll start off by saying I haven’t used these extensively, really 2 days of on-set testing. I work on big budget movies and tv shows and we only use SDI cables, so I cannot comment on any HDMI capability. That said, on a professional set nowadays you have an incredible amount of signals being bounced around and that was a huge worry of mine about the C1. My feed being wireless in this way is one of the last things that needs to be wireless (behind sound’s various antennae, wireless focus pullers, wireless iris controls, wireless feeds for AC’s & DP, wireless streaming iPad monitoring like QTake) but it would be so much more helpful if I could be. I plugged these in and expected various other depts to start complaining about things malfunctioning. But nothing happened. Everything worked!I didn’t truly get to test distance. I was never too far from the transmitter but I was far enough and through some walls where I expected less. Keep in mind I’m used to using Teradek systems that are much, much more expensive than this and I’m used to those being quirky. The video quality was good, the lag was not noticeable (this is the reason I don’t use a QTake or other streaming monitor system, I can’t have the lag). I’m not a focus puller so I can’t speak to if it’d work for them as advertised but I did put my laptop right next to a focus monitor and to my eye couldn’t see a difference. The image was a little dark, there’s many reasons for this so I’m not going to blame the device for that. I bought a few 970 batteries and I was able to run the receiver off of one for almost a full 13 hour shooting day, turning it off for lunch and when there’d be some downtime between setups.So far so good. It comes in a hard shell case that has all the foam cut to size, with 2 different types of antennas (with more types available), a DC adapter, a USB A to USB C adapter and a mini magic arm. Which is a nice array of stuff. I do think it would make more sense to have 2 DC adapters however. And you might be close to throwing that USB adapter away since you’re just gonna plug it straight into a USB C port anyway right? Here’s the rub. This thing is super picky about what cables it’ll let power it and provide video (one of the biggest advertised features is how you can just plug it into your computer). I haven’t heard of anyone being able to use a pure USB C to USB C cable of any kind (though you’ll see that in their ads). I’ve tried A LOT and not even the one that powers my Blackmagic Ultrastudio Recorder 3G and takes a video feed from it works. According to the actual company, you need a USB A on one end (this the adapter) to supply enough power. Also you won’t see the device in any device list unless it is receiving an image. The other thing is the support is less than stellar, mostly directing you to a Facebook page that mostly has people asking unanswered questions.
Larry Brummett
2025-07-29 15:16:56
We are on tour and opening for the headliner. Our front of house camera needs to be struck and on the truck before 5 finger death punch needs the dock. We couldn't wait to strike a camera cable from under the feet of the audience. This option has been flawless. We added a second unit to our photographers camera. It has added wonderful options for our imag.
erwinh22
2025-07-08 12:23:11
Unpacked these on site expecting them to work like the other Hollyland 300s we have (basically plug and play) and these just would not work. The transmitter/receiver connected successfully but the image would flicker non-stop, even when the two units were sitting on a desk next to each other. We tried manually setting the channel (instead of Auto mode) and same thing. Changed HDMI cables, tried modifying antenna positions, playing with the menu settings, nothing. We believe we got a defective set and unfortunately had to return them. Wasted too much time getting them to work.Since we were in a hurry to start our shoot, we plugged in our 300s and away we went. NO hassles.Not sure if I would risk investing in these again. Great concept. Poor execution.
Jinsoo Kim
2025-07-07 15:45:40
Connection was very easy. Using it was super easy too.
Lucas Hicks
2025-04-24 14:46:38
Absolute buy! 100 percent!
Jean
2025-04-04 14:07:59
Excelente herramienta a la hora de hacer streaming en grandes espacios.
Claud R.
2025-03-15 16:43:52
I ordered this set to use for my live-stream mobile rig at church and I’m super happy with it.Having previously used the Mars 4K and experiencing signal loss when not in direct sight or further than 120 feet, I had high hopes for this one and it delivered.The mushroom antennas work like a charm even when there’s obstacles in between the TX and RX or they are not in direct line of sight.The range is no longer an issue either.This one also has lower latency compared to the Mars 4K and it’s quite noticeable.If you live stream on a regular basis or want to monitor a camera from a distance, this is a great investment.
Jose Eduardo
2025-03-10 14:55:11
La facil conectividad
Chris O'Brien
2025-02-14 11:22:52
Really good quality very happy
ibrahim soudjay
2025-02-01 16:33:31
Juste un petit latence mais la qualité d'image impeccable
wabasson
2025-01-23 17:48:09
Simplement génial !
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