Hollyland Cosmo C2 HDMI/SDI Wireless Video Transmission System

The Hollyland Cosmo C2 HDMI/SDI Wireless Video Transmission System is an advanced solution for filmmakers, cinematographers, and content creators who need reliable, high-quality wireless video transmission. Designed to streamline multicamera productions and livestreaming, this system enables video transmission in 1080p60 over distances up to 1000 meters (3000 feet) in line of sight, with an ultra-low latency of just 33ms. Powered by HEVO 2.0 technology, the Cosmo C2 delivers stable, uninterrupted transmission even in environments with wireless interference, making it ideal for live events, studio productions, and on-location shoots.

The system includes two transmitters (2TX) and one receiver (1RX), a configuration that reduces the number of devices and cables required, enhancing video feed synchronization and simplifying workflows. Each transmitter supports HDMI and SDI inputs with an SDI loop-through output for local monitoring, while the receiver provides two HDMI outputs, two SDI outputs, and an RJ45 Ethernet port for network connectivity. This flexibility ensures compatibility with a wide range of cameras, monitors, and switchers, making the Cosmo C2 suitable for any professional production setup.

HEVO 2.0 technology marks a significant upgrade from the previous Cosmo C1, featuring a seamless frequency-switching algorithm that detects interference and switches to a clean channel in 0.001 seconds. This ensures stable transmission even in crowded wireless environments. The Cosmo C2 also supports fractional frame rates (such as 1080p24/25/30) and includes an FPS Booster function, which converts low-frame-rate inputs to 60fps outputs for smoother visuals. In case of transmission interruption, the system freezes the last frame instead of displaying the manufacturer’s logo, with the option to upload a custom image via USB (JPG format, 1920x1080, under 1MP).

The Cosmo C2 excels in streaming connectivity. It supports UVC for direct 1080p60 video transmission to a computer via USB-C without requiring capture cards, simplifying livestreaming on platforms like YouTube and Twitch using the RTMP protocol. Additionally, the receiver is compatible with the NDI|HX protocol, allowing video streams to be transmitted over a single network cable, reducing cable clutter and enhancing production efficiency. AES-128 encryption ensures data security, preventing video signal leaks.

For power options, the Cosmo C2 is highly versatile. Transmitters can be powered via DC inputs (6-16V) or NP-F batteries, while the receiver supports DC inputs or V-Mount batteries, ideal for extended shooting sessions. Both units feature bright OLED displays for easy setup and status monitoring, with an intuitive user interface that includes buttons on the receiver and a joystick on the transmitters. The compact design (transmitter dimensions: 11.5 x 7 x 3.3 cm, weight: 200 g) and 1/4"-20 threads with cold shoe adapters enable versatile mounting on tripods, cages, or rigs.

The system is built for reliability, with quiet, adjustable-speed fans that keep the units cool without interfering with audio recording. The ability to use up to two transmitters with a single receiver makes it particularly suited for multicamera productions, such as sports events, concerts, or live broadcasts, where synchronization and cable reduction are critical. The Cosmo C2 is an excellent choice for professionals seeking a cost-effective yet powerful wireless system capable of handling the complexities of modern video productions.

Package Contents:

• Cosmo C2 Wireless Video Transmitter x 2
• Cosmo C2 Wireless Video Receiver x 1
• Blade Antenna x 7
• 12V/2A DC Power Adapter x 1
• USB-C OTG Adapter x 1
• Expansion Accessory x 2
• Cold Shoe Adapter x 2
• User Manual x 1