SKU: 62863978871

Hollyland Syscom 421-2TX, 2x Transmitter, 1x Receiver, 15x Antenna, 2x Arm Mounts

Sale price$45954.00 Regular price$51060.00
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Description

Hollyland Syscom 421-2TX, 2x Transmitter, 1x Receiver, 15x Antenna, 2x Arm MountsThe Hollyland Syscom 421 2TX (2x Transmitter, 1x Receiver) bundle is a professional, multi camera wireless video transmission kit engineered specifically for mid sized live broadcasts, multi cam live streaming, and commercial video sets. By utilizing a multi channel receiver hub, this system allows two independent cameras to broadcast real time video to a single central receiver over a single RF channel, drastically saving valuable wireless bandwidth

The Hollyland Syscom 421-2TX (2x Transmitter, 1x Receiver) bundle is a professional, multi-camera wireless video transmission kit engineered specifically for mid-sized live broadcasts, multi-cam live streaming, and commercial video sets.

By utilizing a multi-channel receiver hub, this system allows two independent cameras to broadcast real-time video to a single central receiver over a single RF channel, drastically saving valuable wireless bandwidth and preventing frequency congestion on a busy set.

Core Hardware & Kit Inventory

  • 2 × Syscom 421 Transmitters (TX): Mounted onto your individual camera rigs. Each unit accepts both 3G-SDI and HDMI video feeds up to 1080p60 and transmits them over a massive 1,800-foot (550m) Line-of-Sight (LOS) range.

  • 1 × Syscom 421 Multi-Cam Receiver (RX): Positioned at your director's station or video switcher booth. It simultaneously picks up both video feeds and outputs them across 2 dedicated HDMI and 2 3G-SDI ports.

  • 15 × High-Gain 5GHz Antennas: This generous count is mathematically designed for field redundancy. Both transmitters and the receiver require 4 antennas apiece to run their high-throughput MIMO (Multiple-Input Multiple-Output) wireless arrays (4 x 3 = 12 antennas in active use). Hollyland provides 15 total antennas in this package so you have 3 complete spares on hand if an antenna breaks or goes missing during a chaotic build.

  • 2 × Articulated Magic Arms (7-Inch): Heavy-duty friction mounts used to securely clamp each of the two transmitters onto your cameras' cages, top plates, or cold shoes without slipping during rapid pans.

Pro-Tier Multi-Cam Integration Features

  • Bidirectional PTZ & Tally Control: The system passes data back and forth seamlessly. It includes integrated RS-485/RS-422 serial links and RJ45 network terminals, allowing a technical director at the switcher booth to send remote PTZ (Pan-Tilt-Zoom) joystick commands back to a robotic camera rig. It also pushes physical Tally light data to notify operators and on-camera talent which feed is currently "live."

  • Wired Ethernet RTSP Streaming: The receiver hub features a native LAN port. You can plug it straight into a local router or streaming computer to execute direct RTSP network pull-streams, simplifying workflow routing into software switchers like vMix or OBS Studio.

  • Flexible Broadcast Power Solutions: Built for continuous deployment. Every unit features a rear-mounted Sony NP-F (L-Series) battery plate for mobile or handheld operations, alongside a locking 2-Pin LEMO DC barrel input (7–36V) to draw robust, continuous power directly from a cinema camera’s V-mount or Gold-mount D-Tap distributor block.

Technical Specifications Matrix

Feature Specification
System Scalability Limits Out-of-the-box 2TX setup (Scalable up to 4TX total to a single RX)
Maximum Operating Range Up to 1,300 Feet (400m) standard / 1,800 Feet (550m) Max Line-of-Sight
End-to-End System Latency Minimal 0.07 Seconds (70ms) processing window
Wireless Core Carrier 5.1 GHz to 5.9 GHz High-Throughput Frequencies
Video Processing Resolutions 1080p, 1080i, and 720p at 60/50/30/25/24 frames per second
Chassis Build & Durability Industrial, heat-dissipating Aluminum Alloy

💡 On-Set Channel Allocation Tip: Because this system encodes multiple video links onto a single 40 MHz channel block, it makes multi-camera operations incredibly clean. If you need to expand your coverage down the road, you do not need to buy a completely new wireless system or worry about frequency coordination—you can purchase individual standalone Syscom 421 transmitters later and sync up to four cameras total directly into this exact same receiver hub.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 62863978871

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4.2 ★★★★★
Based on 27 reviews
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Verified Purchase
Holly Gilster
Dallas, US
★★★★★ 5
Surprisingly good
Size: Gravity, Color: Deep Space Grey
I bought a very old Lexus as a second backup car and as such, it doesn't have any of the amenities we are used to. This phone holder is surprisingly smartly designed. Every time I put my phone in it I'm impressed that it holds it in place.
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Reviewed in the United States on August 4, 2025
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Verified Purchase
PDD
Omaha, US
★★★★★ 5
Outstanding! 5 Stars for Mobility, Durability, Functionality and Ease of Use.
This little invention is outstanding! It holds phones of multiple sizes very securely in place without any bonding or sticky attachments that could damage your vehicle. Mobility is simple as it's easy to add and remove to any vehicle with air condition vents. Best of all, various size devices can be easily held in place with a quick squeeze of the side mounts and just as easily removable with a single press of a release button on the back side. The mount is also very strong and holds up to various temperatures. For example, in the summer it can become very hot in an enclosed vehicle and this mount holds up when other mounts tend to fail from over exposure to heat. The failure causes the joints or fittings to loosen, which will cause your device to slip from an intended position. Well, that is not a problem with this one. It has stood the test of time as I have used this mount for over a year in extreme environments. In the end, it appears that my family has come to like this product too. Ahem, my wife just took mine! So, I have returned to purchase another one for myself and two more for my daughters. Then I don't have to worry about my daughters taking mine either. Yes, I'm finally thinking ahead, so maybe you should think ahead and get additional copies for your family members. Either way, try one and you'll likely be back for more. It makes a great gift. I highly suggest this product to everyone who needs a mobile device mount for their vehicle.
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Reviewed in the United States on August 4, 2025
S
Verified Purchase
sicario
Natrona Heights, US
★★★★★ 5
Excellent Product and Exceptional Quality and Service – Highly Recommend!
I recently purchased the LISEN Car Phone Holder Mount [Military Stable] and couldn’t be more impressed! From the moment I unboxed it, I could tell it was built to last. The design is sleek and modern, and it holds my iPhone 15 Pro Max securely without any wobbling, even during bumpy rides. The military-grade stability lives up to its promise—this mount stays firmly in place, and the adjustable clamps fit my phone perfectly. What really stood out to me was the ease of installation. It attaches to my car vent effortlessly, with no tools required, and doesn’t block any air flow, which is a huge plus. It’s also compatible with various phone models, including the latest iPhone 16, so I know it will be a long-term solution for my future upgrades. In addition to the great product, the customer service from Linsen was outstanding. They provided timely and clear communication, answering all my questions before I made the purchase. It’s rare to experience such excellent support these days, and it made my buying experience even better. If you’re looking for a reliable, sturdy, and easy-to-use car phone holder, this is the one to get! https://www.amazon.com/dp/B0CXLQDY5B Highly recommend!
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Reviewed in the United States on August 10, 2024
O
Verified Purchase
OBSSD
New York, US
★★★★★ 4
Well made, but not a good fit for Volvo XC40
One issue with this style of holder, is that the swing arm and holder add a fair amount of weight and extends that weight away from the vent, applying quite a bit more leverage on the vent. It may not be as much of an issue on horizontal vents, but the vertical vents on an XC40 will want to swing side-to-side with all that weight. As for the build of this particular holder, my only real gripe is the adjustment for the swing arm - after tightening the knob, there will still be some play in the arm...you have to jiggle it while tightening it down to fully secure it. The position of the release button allows one-handed removal of the phone, but really only works by pinching with your thumb on the screen. The clip for the vent accommodates relatively wide fins and the tabs can be rotated to help with stability or removed to provide more clearance (though rubberized tabs would be much more helpful).
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Reviewed in the United States on January 9, 2024
M
Verified Purchase
MRF
Fort Morgan, US
★★★★★ 5
Good solid product
Purchased in February of 2025. Very solid item. Use it constantly in our 2011 4Runner and 2017 CX5. This unit attaches firmly to vent fins in both cars. I use iPhone for maps programs and streaming music. When traveling I'm constantly rotating device 90 degrees to use phone in portrait and landscape positions. Unit has shown no signs of losing ability to firmly hold desired position despite frequent rotations. It holds firmly where you place it. Initially I had concerns about placement on dash and blocking view of radio face, clock, MPG indicator, and other displays. Didn't take too long to realize the flexibility of this thing and the many, many positions you can place it due to multiple rotational joints. Pricing was fair. If this ever wears out, I will want to buy another.
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Reviewed in the United States on December 8, 2025

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