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
⚡ Hollyland Cosmo C1 (SDI/HDMI) • Power Profile
- Operating Voltage: 6V to 16V DC (Locking DC Input) / 7.4V NP-F Plate / USB-C (5V/2A)
- Power Draw (Per Unit — TX or RX): ~9W per unit (Official Hollyland rating: <9W for TX and <8W for RX)
- Power Options: Integrated Sony NP-F battery plate, locking DC input (via D-Tap cable), or USB-C power input
⏱️ Runtime Per Unit (~9W Draw @ 85% Efficiency)
- 🔋 1x NP-F 570 (26Wh): ~2.5 hours (2h 27m)
- 🔋 1x NP-F 770 (47Wh): ~4.4 hours (4h 26m)
- 🔋 1x NP-F 980 (74Wh): ~7.0 hours (6h 59m)
- 🔋 V-Mount 98Wh (via D-Tap to DC): ~9.3 hours (9h 15m)
- 🔋 V-Mount 150Wh (via D-Tap to DC): ~14.2 hours (14h 10m)
📊 The 85% Efficiency Standard
- Usable Capacity: Runtimes apply a 0.85 multiplier (Usable Wh = Rated Wh × 0.85) to account for low-voltage RF cutoff protection and DC-DC conversion heat loss.
⚠️ Production Note: Runtimes above apply to a single unit (TX on camera or RX at monitor) running on its own battery. Add ~9W to your camera rig calculation when powering the TX via D-Tap.
🛠️ Rig Calculator: Powering the Cosmo C1 from your camera battery? Use the FRENEL Power & Battery Runtime Calculator to calculate your full rig runtime.
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
