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SWIT S-4904 SDI/HDMI 700 meters Wireless Transmission System

SWIT S-4904 SDI/HDMI 700 meters Wireless Transmission System

  • Professional WHDI (MIMO/OFDM) technology
  • Uncompressed 3G/HD/SD-SDI and HDMI
  • 2-ch SDI/HDMI embedded audio transmission
  • 700 meters, 2300 feet (LOS) transmission distance
  • Less than 1ms latency
  • Professional WHDI (MIMO/OFDM) technology
  • 5.1-5.9GHz license-free operation frequency
  • User configurable frequency bands
  • Multicast – 1 transmitter to multi receivers
  • Gold-Mount or V-Mount Plates
  • Carrying Case Included
Ships in 1-2 Weeks

Select Gold-Mount or V-Mount Battery Options above.

Wireless 3G-SDI and HDMI Video Tramission, 700 meters (2,300 feet)

SWIT S-4904 is the broadcast industry wireless video transmission system designed for ENG Cameras, includes an S-4904T transmitter and an S-4904R receiver, with WHDI (OFDM) technology, supports uncompressed 3G/HD/SD-SDI and HDMI wirelessly transmitted in 700 meters scale, and with less than 1ms latency. The system is pure hardware connection, plug and play build-up, which is widely used in on-site shooting and director monitoring.

Input and Output

Transmitter S-4904T supports:

  • 3G/HD/SD-SDI input ×1
  • HDMI ×1

Receiver S-4904R supports:

  • 3G/HD/SD-SDI output ×1
  • HDMI x1

Both SDI and HDMI on the receiver can be output simultaneously. If both SDI and HDMI is input to transmitter, the receiver will give priority to output SDI signal.

Approx. 700m (2,300 ft) Effective Distance (Uncompressed SDI/HDMI, less than 1ms latency)

In Line of Sight, the S-4904 wireless transmission system support approx. 700 meters effective transmission distance of uncompressed 3G/HD/SD-SDI and HDMI signal, and the latency is less than 1 millisecond.

Embedded Audio Transmission

The S-4904 supports SDI and HDMI embedded audio (ch-1 & ch-2) transmission.

5.1-5.9GHz Operation Frequency License Free

The S-4904 wireless system runs at 5.1-5.9GHz License-free operation frequency. The frequency bands are user configurable and support at most 4 wireless channels in one location. The radio power is less than 63mW and will not do harm to human bodies.

Multicast support (1 transmitter to multi receivers)

You can set several S-4904R receivers at the same frequency bands as the 1 S-4904T transmitter to enable the multicast mode.

Power Supply and Installation (V-Mount or Gold Mount optional)

The transmitter S-4904T is equipped with V-mount or Gold mount plates, to be easily fixed on cameras and attached with batteries. The receiver S-4904R is equipped with V-mount or Gold mount plates to be powered by batteries. Both the transmitter and receiver can also be powered via the 5.5/2.1mm pole DC in socket of 6.5-17V input. 

More Information

Inside the Box

The wireless system package provides:
1x S-4904T Transmitter (V-mount / Gold mount optional)
1x S-4904R Receiver (V-mount / Gold mount optional)
7x Antennas
1x Articulating arm trestle
1x Crab clamp
1x D-tap to 5.5/2.1mm pole cable
1x 5.5/2.1mm pole power adaptor
2x Flat screwdriver (for band configuration)
Carrying Case



Model Transmitter S-4904T Receiver S-4904R
Input 3G/HD/SD-SDI×1 /
Output / 3G/HD/SD-SDI×1
SDI Format SMPTE-425M 1080P (60 / 59.94 / 50)
SMPTE-274M 1080i (60 / 59.94 / 50)
1080p (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-RP211 1080psf (30 / 29.97 / 25 / 24 / 23.98)
SMPTE-296M 720p (60 / 59.94 / 50)
SMPTE-125M 480i (59.94)
ITU-R BT.656 576i (50)
HDMI format 1080p (60 / 59.94 / 50 / 30 / 29.97 / 25 / 24 / 23.98)
1080i (60 / 59.94 / 50)
720p (60 / 59.94 / 50)
480i / 576i
Wireless frequency 5.1~5.9GHz
Radio modules OFDM 16QAM
Max Transmission distance Approx 700m (Line of sight)
Latency ≤1 millisecond
Power consumption ≤6.5W ≤6.5W
Radio power Max 21dBm (63mW) /
Input voltage DC / Battery:6.5~17V DC / Battery:6.5~17V
Working environment Temperature: 0°C -+40°C
Dimension 93×185×63 (mm) 130×188×47 (mm)
Net weight(with antenna) 572g 797g
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