Hollyland Cosmo C2 2TX & 1RX | Stable dual transmission up to 1,000 metres.

The Hollyland Cosmo C2 2TX & 1RX is a wireless video transmission system designed for professional environments where mobility, quality, and reliability are essential. With two transmitters (2TX) and one receiver (1RX), it allows video signals from two different cameras to be sent to a single reception point, reducing cabling and facilitating multi-camera productions, events, broadcasts and live streaming. Its advanced technology ensures a stable link even in demanding and distant scenarios.

Key features:

• Wireless range: up to 1,000 meters of sight, suitable for outdoor productions and large states.
• Ultra-low latency: just 33 ms, ensuring reliable synchronisation for live events.
• HEVO 2.0 technology: intelligent spectrum management with automatic frequency hopping to avoid interference.
• Video compatibility: HDMI and SDI available on both transmissions and receiver, including SDI loop-out on TX.
• Advanced streaming protocols: support for NDI-HX3, UVC (direct emulation as a webcam) and RTMP for quick integration with platforms.

Technical specifications:

• Solution: 2 TX + 1 wireless RX.
• Maximum range: 1,000 m / 3,000 ft.
• Latency: 22 m/s.85
• Transmission frequency: 5.15 - 5.85 GHz
• TX inputs: 1× HDMI 1.4b + 1× 3G-SDI + SDI loop-out
• RX outputs: 2× HDMI 1.4b + 2× 3G-SDI + USB-C OTG + RJ45 (100 Mbps)
• Supported video formats: 720p, 1080i, 1080p (23.98-60 fps) via HDMI/SDI
• Power supply: Transmitter: NP-F or DC 6–16 V • Receiver: V-Mount or DC 6–16 V
• Power consumption: TX: 10 W • RX: 11 W
• Weight: TX: 210 g • RX: 440 g
• Latency at 1000 m: 22 ms maintained even at minimum distance

Main applications:

• Live multi-camera production (events, concerts, sports)
• Professional live streaming (YouTube, Twitch, social media)
• Audiovisual productions, broadcasting, ENG/EFP
• Filming oudoors or in large spaces without heavy cabling
• Recordings with multiple cameras transmitting to a single receiver (mixer, switcher, recordings, retransmissions)

Practical example:

During the filming of an action scene outdoors, two cameras are set up: a main camera on a steadycam and a secondary camera on a motorised arm for moving shots. Both Cosmo C2 transmitters send the signal simultaneously to the receiver located in the video village station, where the director and DIT monitor the footage in real time. With a latency of just 33 ms and a stable long-distance wireless link, the team can evaluate framing, focus and continuity without interruptions or cables limiting camera movement.