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 Sep 1 - Sep 6

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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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4.0 ★★★★★
Based on 20 reviews
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Product Reviews
M
Verified Purchase
MexicanRadio
Lowell, US
★★★★★ 5
So good we bought another
Color: Red
We spend a lot of time in Baja California, and rough, unpaved roads result in lots of tire punctures. Having a decent air compressor is therefore "necessary equipment". This unit inflates tires reasonably quickly, automatically displays the pressure in the tire before you set the desired inflation pressure, and shuts off automatically when the desired pressure is reached. The display is easy to read. The short, detachable hose is easily attached and removed, and stores in the bag with the pump. The hose length works for most common automobile tires, and will work for oversize tires by rotating the wheel to bring the valve stem closer to the ground. Attachment to the valve stem is easily accomplished with its lever-lock working end. The unit can additionally function as a battery booster for starting a vehicle with a low battery. Installation of the cable for that purpose is easily done, and it worked just fine when we had to use it on one of our two vehicles one morning, allowing the car to be started quickly and easily. Charging is accomplished with a standard USB charging cable (USB-A style at one end, and USB-C style connector at the other end). We had a puncture that required the pump to be used multiple times to get the 12 miles back to a tire repair shop. We could charge the pump up easily and quite quickly via the vehicle's USB port, stopping every few miles to pump the tire back up enough to keep going on the highway without having to go through the trouble of unloading the trunk to change the tire for the "doughnut" spare at the side of the road. Having those two experiences just shortly after we received the pump was more than enough proof that we should have another for our other car. I'd recommend it for its small, easily stowable size, good battery capacity and ease of use.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 30, 2026
T
Verified Purchase
Twinkie
Omaha, US
★★★★★ 5
It works and I’m happy!
Color: Red
This item is terrific! A bit noisy but it’s compact and works like a charm. Inflates my tire quickly. I have not used it to jump start my car, but I’m convinced it would work just fine. Great price too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
N
Verified Purchase
NV
Battle Creek, US
★★★★★ 4
Good thing to keep in your trunk
Color: Red
This has been a pretty helpful thing to have in the car. My tires have been losing pressure recently and this helps keep them topped off while I wait to change my tires. It's easy to use and the value for the price is great. The main issue is that it seems to need a full charge in order to jump a car because I had issues using it to jump my car when half charge, but no issues at full. Also the cable lengths are a bit short.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 10, 2026
E
Verified Purchase
Erik L
West Palm Beach, US
★★★★★ 5
Worked like a charm to jump start my Mazda
Color: Red
My Mazda CX-30 wouldn't start one day. I knew these rechargeable jump starters were a thing so I jumped on Amazon and got this one same day. Worked like a charm! Inside the main unit is basically a giant power bank. It charges with a USB-C in, which is awesome and universally available. It even has a USB-A out port to charge another device. I charged it up to full when I first got it, even though it already had some juice in it and I *think* you'd be able to get an emergency jump right out of the box if you needed to. The directions are simple. Plug the battery clamps into the box, then clamp them onto your battery. A green light tells you that it's ready to go. Press the BOOST button, then go into your car and start it up with in 30 seconds. Then remove the clamps and away you go. No sparks, no scary sounds, no worries. I jumped it twice and it still had enough charge for possibly a few more. Other great emergency features: the tire inflator has programmable pressure. The light is nice and bright and stays steady for a flashlight or blinks for emergency. And I already mentioned the USB out for charging another device. This is a great, indispensable emergency device for anyone's car. I'm glad I got it and I'll make sure it stays charged in my glove box.
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Reviewed in the United States on May 7, 2026
N
Verified Purchase
Nick C
Boise, US
★★★★★ 5
Great for emergencies !!
Color: Red
This GOOLOO A3 jump starter is super handy to have in the car. It started my vehicle quickly with no issues, and it’s really easy to use. The built-in air compressor is a big plus. It fills tires fast, and I like that you can set the pressure and it shuts off automatically. It’s compact, holds a charge well, and feels solid. Definitely a great all-in-one emergency tool. Highly recommend!
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Reviewed in the United States on April 23, 2026

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