SKU: 320813313

Hollyland COSMO C1 Wireless SDI/HDMI Transmission System

Sale price$346.05 Regular price$384.50
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Ships within 48 hours · Estimated delivery Aug 27 - Sep 1

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Description

Hollyland COSMO C1 Wireless SDI/HDMI Transmission SystemThe newest member of Hollylands COSMO series, the COSMO C1, establishes a new standard for real time video monitoring at up to 1,000ft line of sight, thanks to Hollyland's transformative HEVO wireless transmission technology. With COSMO C1, you finally have a complete, but simple, solution for streaming and cloud sharing your video creativity. Designed for precise follow focus and high image clarity, COSMO C1 is a silver bullet for videographers and

The newest member of Hollyland’s COSMO series, the COSMO C1, establishes a new standard for real-time video monitoring at up to 1,000ft line-of-sight, thanks to Hollyland's transformative HEVO wireless transmission technology. With COSMO C1, you finally have a complete, but simple, solution for streaming and cloud-sharing your video creativity. Designed for precise follow focus and high image clarity, COSMO C1 is a silver bullet for videographers and focus pullers. It’s time to say “Hi” to a whole-new smooth viewing experience.

Smooth video, even in challenging situations

COSMO C1’s boosted signal strength and superior anti-interference capability in the 5.1GHz-5.8GHz spectrum guarantee buttery-smooth video transmission, even in complex environments. The COSMO C1 is also the first in its field to integrate UVC (USB Video Capture) technology, COSMO C1 offers a whole simplified solution to stream and cloud-share your video works.

HEVO uses adaptive frequency hopping (AFH), in only 0.001 seconds, at both receiving and transmitting ends, plus seamless re-transmission technology. Together, these features give you exceptional reliability, boosted signal strength, and superior anti-interference performance. No matter whether you’re using manual or auto-switching modes, you can wave goodbye to flickering, glitches, and black screens. Moreover, you can simultaneously run four of these video transmission systems at one location without compromising on smooth video delivery.

Simple USB-C connectivity

With COSMO C1, you only need one USB-C connection to provide full 1080P60 HD video quality to a computer for direct live streaming, thanks to HEVO’s support for UVC (USB Video Capture). There’s no video capture device needed, and no additional settings. You just have to connect one simple USB-C cable and it just works!

HEVO brings ultra-low latency and glitch-free performance

Based on Hollyland's self-developed protocol, HEVO technology improves video coding efficiency by 30%. The acceleration module embedded in COSMO C1 achieves ultra-low latency as low as 40ms, aided by HEVO’s fast adaptive frequency hopping (AFH) and seamless retransmitting technology. There is no compromise on image output and transmission latency within a wide 1,000ft LOS range.

Unparalleled compatibility and flexibility

COSMO C1 supports HDMI and SDI connections on both TX and RX units, plus an SDI loop-out on the TX unit. It can work with any mainstream camera, monitor, or switcher. In addition, there are three power supply options to escort in different shooting scenes. DC power supply is great for indoor projects, while the N-PF/L-series battery and power-capable USB-C port help make the unit portable for run and gun missions. The red low battery indicator lets you know when you have 20 minutes of battery power remaining, to prevent last-minute panics.

Provides everything you need

The COSMO C1’s highlights include up to 1,000ft LOS range, superior anti-interference making it possible to run four systems at one location, HEVO for low latency and stable frequency hopping, full 1080P60 HD video over a single USB cable, vertical and horizontal mounting options, and three versatile power supply options.

Features

  • As low as 40ms Transmission Latency                                                     
  • 1000ft Wireless Transmission Range (LOS)                                 
  • Supports Smart Channel Selection
  • Transmitter Supports SDI Input, HDMI Input, and SDI Loop out.
  • Receiver Supports 2*SDI Outputs and HDMI output
  • Supports DC Power Supply, Battery, and USB Type-C Power Supply
  • Supports UVC Pull-streaming

In the Box:

  • 1x Transmitter
  • 1x Receiver   
  • 4x Antenna
  • 2x Mushroom Antenna
  • 1x Cold Shoe
  • 1x Magic Arm
  • 1x Type-C Converter
  • 1x DC Adapter
  • Warranty Card     
  • Expansion Accessory       

Specifications

 

Transmitter

Receiver

Interfaces

Antenna Interface(RP-SMA Male)

HDMI Input(Type A Female)

SDI Input

SDI Loopout

DC Input

USB Type-C

Antenna Interface(RP-SMA Male)

HDMI Input(Type A Female)

SDI Output*2

DC Input

USB Type-C

Power Supply 

DC Power Input: 6~16V

USB Type-C Power Supply: 5V/2A

Battery Power Supply: 6-16V 

DC Power Input: 6~16V

USB Type-C Power Supply: 5V/2A

Battery Power Supply: 6-16V  

Power Consumption

<9W

<9W

Weight

214g(Without Exterior Antenna)

210g(Without Exterior Antenna)

Dimension

(L*W*H) 115*70*32mm(Battery Plate Excluded)

(L*W*H) 115*70*32mm(Battery Plate Excluded)

Input/Output Video Format

HDMI:

480p60
576p50
720p50/59.94/60

1080i50/59.94/60

1080p23.98/24/25/29.9/30
1080p50/59.94/60

 

SDI:
1080p60/59.94/50(Level A)

1080p60/59.94/50(Level B)

1080i60/59.94/50

1080p30/29.97/25/24/23.98
1080psf25

720p60/59.94/50

1080psf24/23.98

HDMI:

480p60

576p50

720p50/60

1080i50/60

1080p24/25/30

1080p50/60

 

SDI:

1080p60/59/50(Level A)

1080i60/59/50

1080p30/29/25/24/23

1080psf25/24/23

720p60/59/50

Frequency

5.1GHz~5.8GHz

5.1GHz~5.8GHz

Transmission Power

Maximum 22dBm

 

Receiver Sensitivity

 

-80dBm

Transmission Latency

As low as 40ms

Bandwidth

20MHz

20MHz

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 320813313

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4.7 ★★★★★
Based on 29 reviews
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Verified Purchase
MMF
Lexington, US
★★★★★ 5
Love the long sleeves!!!
Color: White, Size: Small
Love it! I'm 5' 11" tall and I purchased this according to reviews. Several people commented on the length of the sleeves. I have a hard time finding sleeves long enough if it's not " tall" sized. It was perfect for me. If this washes nice I'm going to consider purchasing more in other colors. I ordered the white and just love the long ribbed cuffs with the line of buttons. Very soft.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 1, 2026
C
Verified Purchase
Cindee
Phoenix, US
★★★★★ 4
Nice cozy sweater, but handwashing is recommended
Color: Beige, Size: Medium
Soft and cozy, but does not wash well. Goes with everything. This sweater fits well and looks great. I received lots of compliments while wearing it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 23, 2026
H
Verified Purchase
Hillary K
Port Orchard, US
★★★★★ 5
Great sweater for winters in the Midwest
Color: Black, Size: X-Large
Love this sweater! I went back and got another color! The fit is true to size and very comfy. The button detail on the sleeves just adds a little pizazz. The weight of the sweater is perfect for winters in the Midwest.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
K
Verified Purchase
KatieMae
New York, US
★★★★★ 5
Flattering fit
Color: Dark Green, Size: XX-Large
This sweater is thick and stretchy but holds a nice shape, and is flattering on the body. The sleeves are nice and long too, which I really appreciate, being a tall person... the button detail is a great addition. True to size. I haven't washed it yet, and I imagine, based on the kind of woolly knit it is, that this sweater will eventually pill... but for now I'm enjoying being cozy and stylish. The deep green color is almost black green. I LOVE IT.
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Reviewed in the United States on February 2, 2026
G
Verified Purchase
GypsySoul
Birmingham, US
★★★★★ 5
Love it
Color: Dark Green, Size: Small
I got the dark green. Love the sweater and it's warm. I do layer the sweater as well. It is as pictured. Size is perfect to me. I like sweaters to be longer and a bit wider in case it is freezing and I need to layer it. This sweater is perfect for layering. It comes closer to my backside, it is a little wide and not snug, and I like that the sleeves come over my wrists
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 7, 2026

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