Cosmo C1 Stable, You Get It
- HEVO Solution
- Embedded UVC for Direct Live Streaming
- Ultra-low Latency of 0.04s
- Seamless Channel Switch
- HDMI & SDI Dual Interfaces
- 1,000ft (300m) Transmission Range
- Full HD
- Multiple Power Supply Options

HEVO, the Game Changer
No Flickering, No Black Screen

Adaptive Frequency Hopping
HEVO, a seamless transmission technology empowered by adaptive frequency hopping (AFH), brings exceptional reliability, boosted signal strength, and superior anti-interference performance. Say goodbye to flickerings, pauses, and black screens throughout the production. 

HEVO — Fast, Stable, and Smart
Seamless Channel Switch — You'll Never See It. HEVO completes synchronous frequency hopping in 0.001s at both the receiving and transmitting ends, ensuring picture integrity at the very instant of the frequency switch. In either the auto or the manual switch mode, your live streaming and production monitoring will no longer experience black screens.

HEVO with Embedded UVC
All You Need Is a USB-C Cable. With HEVO, UVC is embedded in the Cosmo C1. It simply uses one USB-C cable to transmit 1080p60 HD videos to your computer for direct live streaming. No need for a video capture device or additional settings. It just works!
Note: The embedded UVC is only for progressive (p) scan signals.

HEVO for Zero-Hit Latency
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 the Cosmo C1 achieves an ultra-low 0.04s latency. There is virtually no compromise in image output and transmission latency within the 1,000ft (300m) LOS range.

A Wide Range of Device Compatibility
HDMI & SDI IN/OUT + SDI LOOPOUT. The Cosmo C1 allows HDMI & SDI connections on both the TX and RX, plus an SDI LOOPOUT interface on the TX. Your solution search ends here because it works with any mainstream camera, monitor, or switcher.

Locked to the Max
Patented Ball Catch Design. The patented ball catch design on the backplane can hold the NP-F battery firmly in place. Be rest assured of a secured power supply.

Low-Battery Indicator
A Good Routine to “Save Your Work”. The low-battery indicator helps eliminate another last-minute panic, because the red LED will remind you in advance of a dying battery.

Vertical & Horizontal Mount Design
Built to Match & Easy to Mount. More mounting methods are available on both the transmitter and receiver. The cold shoe mounting design at the front allows you to fix and lay the device horizontally, ideal for achieving a balanced setup on cameras and stabilizers. Its 1/4″-20 threaded hole helps mount the device on any tripod.

Unfailing Power
Three power supply options are available for different shooting scenarios. DC power supply is ideal for indoor shooting conditions, and the use of NP-F batteries and USB-C chargers facilitates mobility and supports your run-and-gun tasks.

Cosmo C1 Applications
The Cosmo C1 is an ideal tool for professional filmmaking and micro-scale events, such as live streaming and commercial shooting.

Packing List
Transmitter x1
Receiver x1
Soft Antenna x4
Mushroom Antenna x2
Cold Shoe x1
Magic Arm x1
USB-C Converter x1
DC Adapter x1
Expansion Accessory x1
User Manual x1
Warranty x1

Specifications

Transmitter
Interface: Antenna Interface (RP-SMA Male) , HDMI Input (Type A Female) , SDI Input , SDI Loopout , DC Input , USB-C
Power Supply: DC Power Input: 6–16V , USB-C Power Supply: 5V/2A , Battery Power Supply: 6-16V
Power Consumption: <9W
Weight: 214g (7.5oz) (Exterior Antenna Excluded)
Dimensions: (L x W x H) 115mm x 70mm x 32mm (4.5" x 2.7" x 1.3") (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
Frequency: 5.1GHz–5.8GHz
TX Power: Maximum 22dBm
Transmission Latency: 0.04s
Bandwidth: 20MHz

Receiver
Interface: Antenna Interface (RP-SMA Male) , HDMI Output (Type A Female) , SDI Output *2 , DC Input , USB-C
Power Supply: DC Power Input: 6–16V , USB-C Power Supply: 5V/2A , Battery Power Supply: 6-16V
Power Consumption: <9W
Weight: 210g (7.4oz) (Exterior Antenna Excluded)
Dimensions: (L x W x H) 115mm x 70mm x 32mm (4.5" x 2.7" x 1.3") (Battery Plate Excluded)
Input/Output Video Format
HDMI: 480p60 , 576p50 , 720p50/60 , 1080i50/60 , 1080p24/25/30 , 1080p50/60
SDI: 1080p60/50 (Level A) , 1080i60/50 , 1080p30/25/24 , 1080psf25/24 , 720p60/50
Frequency: 5.1GHz–5.8GHz
RX Sensitivity: –80dBm
Transmission Latency: 0.04s
Bandwidth: 20MHz