Description
The Cosmo C1 SDI/HDMI Wireless Video Transmission System from Hollyland allows you to transmit up to 1080p60 video via HDMI/SDI inputs up to 1000′ line-of-sight with a low 40 ms latency to an HDMI or dual SDI outputs. 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 system operates on the 5 GHz frequency band and is encrypted to prevent video leakage. The system supports smart channel selection, allowing the system to choose the cleanest channel for transmission. It also supports UVC pull streaming. Both units also feature a bright, easy-to-read OLED display. Each unit is designed to be powered via an L-series battery plate, by the included D adapter, 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.
Key Features
Transmit up to a 1080p60 HDMI/SDI signal to an HDMI or dual SDI outputs
1000′ line-of-sight, uncompressed transmission with a low 40 ms latency
AES-128 encryption to prevent video leakage
Smart channel selection
Supports UVC pull streaming
SDI loop-through output on transmitter
5 GHz frequency band
OLED screen
USB Type-C power input option
L-series battery plates on back of each unit
Power with included DC adapter or with optional USB adapter
Technical Specifications
Hollyland Cosmo C1 Specs
I/O
Antenna Ports Transmitter/Receiver: 2 x RP-SMA Female
Video Transmitter: 1 x BNC (3G-SDI) Input
Transmitter: 1 x HDMI Type A Input
Transmitter: 1 x BNC (3G-SDI) Loop Output
Receiver: 2 x BNC (3G-SDI) Output
Receiver: 1 x HDMI Type A Output
Embedded Audio HDMI/SDI: 2-Channel
Audio None
Power Transmitter/Receiver: 1 x Coax (16 VDC) Input
Other I/O Transmitter/Receiver: 1 x USB 3.1 / USB 3.2 Gen 1 (USB Type-C) Input
Encryption 128-Bit AES
Wireless
Wireless Range 1000′ / 304.8 m
Channel Bandwidth 40 MHz
Frequency Range US: 5.1 to 5.9 GHz
Latency 40 ms
Format Support
Video Format HDMI/SDI
1080p: 60
Wireless Video Compression Uncompressed
Power
DC Input Power 6 to 16 VDC
Battery Type Transmitter/Receiver: 1 x L-Series
Mounting
Mounting 1 x Cold Shoe
Power Consumption
Typical Power Draw:
Internal Battery: None. Both units rely entirely on external power sources.
External Power: The Cosmo C1 system offers three distinct ways to power both the TX and RX units on set:
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Sony L-Series Plate (NP-F): Integrated directly into the back of both units.
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DC Barrel Input (6V – 16V): Perfect for powering via a D-Tap to DC cable from a larger V-Mount or Gold Mount battery.
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USB-C (5V/2A): Can be powered continuously by a standard high-output USB power bank or wall adapter.
Estimated Battery Runtimes
(Calculated using an active 9W draw for the TX on the camera)
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Sony NP-F550 (~15Wh): ~1.6 hours
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Sony NP-F750 (~31Wh): ~3.4 hours
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Sony NP-F970 (~47Wh): ~5.2 hours
(Calculated using an active 9W draw for the RX at Video Village)
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Sony NP-F550 (~15Wh): ~1.6 hours
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Sony NP-F750 (~31Wh): ~3.4 hours
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Sony NP-F970 (~47Wh): ~5.2 hours
Important Disclaimer on Runtimes
The runtimes provided above are estimates only, based on standard mathematical calculations. Your actual runtime may vary depending on the age, health condition, and exact milliamp-hour (mAh) capacity of your specific NP-F batteries, as third-party brands often vary from genuine Sony specifications.
⚠️ Rigging Notes for ACs
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Smart Power Failover: Like other Hollyland units, the Cosmo C1 supports seamless power failover. If you have an NP-F battery attached and a DC or USB-C power source plugged in, it will draw from the active source and switch automatically if one dies, preventing dropped signals during a take.
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Voltage Warning (DC Port): The DC barrel input has a strict 16V maximum limit. Do not attempt to power this unit from a 24V/28V high-voltage cinema block battery, as it will fry the internal power board. Stick to standard 14.4V V-Mounts if using a D-Tap to DC cable.
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USB-C Power Requirements: If powering via the USB-C port, ensure your power bank or adapter can sustain a true 5V/2A output. The manufacturer advises against using fast-charging power banks whose voltages fluctuate rapidly, as this can cause the Cosmo C1 to reboot.
Included
Hollyland Cosmo C1 SDI/HDMI is avalable to rent at FRENEL rental.
Hollyland Cosmo C1 SDI/HDMI Wireless Video Transmission System
Cosmo C1 Transmitter
Cosmo C1 Receiver
4 x Antenna
2 x Mushroom Antenna
Shoe Mount
Pan/Tilt Mount with Shoe Mount
USB Type-C Adapter
DC Adapter
Expansion Accessory
