SKU: 81556335688

BetaFPV A03 400mW 5.8G Open VTX

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Description

BetaFPV A03 400mW 5.8G Open VTXFeatures An open source video transmitter with OpenVTx firmware. The A03 VTX supports SmartAudio and Tramp protocols. Through these protocols, the flight controller is able to adjust the video transmitter settings, which are the power, the band, and the channel of the transmission. A03 VTX is a high quality 5. 8GHz VTX with strong anti interference ability and stable transmission. Comes with PIT RCE 25mW 100mW 400mW adjustable output power, allowing

Features

  • An open-source video transmitter with OpenVTx firmware. The A03 VTX supports SmartAudio and Tramp protocols. Through these protocols, the flight controller is able to adjust the video transmitter settings, which are the power, the band, and the channel of the transmission.
  • A03 VTX is a high-quality 5.8GHz VTX with strong anti-interference ability and stable transmission. Comes with PIT/RCE/25mW/100mW/400mW adjustable output power, allowing the perfect amount of output power to be selected based on your FPV needs.
  • Overall weighing 4.9g with a small-size layout, A03 VTX comes with a 26*26mm mounting hole and is perfectly suitable for whoop or toothpick drones like the X-Knight series, Beta85X/95X series, TWIG series, and Pavo series drones.
  • Featuring a fixed mounting hole and 6-pin connector, less solder work needed, which makes it's super easy to install.

Know More About OpenVTx

Big thanks to Jye Smith and all contributors for their time and energies to OpenVTx project.

OpenVTx refers to open source video transmitter firmware for the FPV community, which aims to provide firmware with both the SmartAudio and Tramp protocols. Either protocol can be used on the flight controller and on VTx power up the protocol used is automatically detected by OpenVTx. For more information, you can know it from OpenVTx GitHub.

Specification

  • Item: A03 5.8G VTX
  • Output power: PIT/RCE/25mW/100mW/400mW (10-26dBm)
  • Supply voltage range: 7-35V
  • Current (8v): <300mA (400mW)
  • Weight: 4.9g (excluding antenna)
  • VTX size: 30.34*30.34*4.6mm
  • Mounting Hole Size: 26*26mm
  • Antenna: Air Antenna (MMCX Straight)
  • Frequency: 5.8GHz 48 channels
  • Raceband: 5658~5917MHz
  • Channel SEL: SmartAudioV2.0 & Tramp
  • Modulation type: FM
  • Antenna port: 50 Ω
  • Operating temperature: -10℃~+60℃
  • Recommend drones: 26*26mm mounting hole

Pinout Diagram for A03 VTX

Below is the diagram picture for A03 400mW 5.8G VTX.

Below is the instruction diagram for connecting the VTX with Toothpick F722 2-6S AIO Brushless Flight Controller 35A(BLHei_32) . The line color in the diagram matches the 6-pin connector wires' color.

VTX Frequency Table

Betaflight CLI for SmartAudio or Tramp protocols can be obtained from here:

https://github.com/OpenVTx/OpenVTx

Included

  • 1 * BETAFPV A03 5.8G VTX
  • 1 * 6-Pin FC Cable
  • 1 * Air Antenna(MMCX Straight)
  • 3 * Anti-Vibration Rubber Dampers
Shipping Notes
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Exchange/Return Notes
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SKU: 81556335688

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Loree S
Battle Creek, US
★★★★★ 4
Finding Yourself in the Middle of the Mess
Format: Paperback
Bed and Breakup by Susie Dumond is one of those reads that feels fun on the surface but hits deeper when you least expect it. The setup pulls you in quickly, but what keeps you reading is how real the emotional journey feels. The main character is figuring things out in a way that feels honest and a little messy, which makes it easy to stay invested. There is humor, but it does not take away from the growth and self-awareness that builds over time. The relationships feel grounded, not rushed, and you can see the shift in how she shows up for herself.
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Reviewed in the United States on March 21, 2026
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stargirl
Draper, US
★★★★★ 5
Excellent, Fun Read!
Format: Paperback
This book is AMAZING! Such a fun romance, set in an adorable Ozark hideway.
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Reviewed in the United States on September 3, 2025
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Sylvie13
West Palm Beach, US
★★★★★ 3
Cute
Format: Paperback
This was a cute Sapphic romcom set in eureka springs Arkansas. Molly and Robin are so cute together and I love all three characters. The diversity is done very well and I love the tidbits about the town lore and how an old inn could bring these two lovebirds back together after so many years apart.
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Reviewed in the United States on March 19, 2026
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Mollie Ficarella
New York, US
★★★★★ 4
Cute way to pass the time
Format: Paperback
Thank you to Dial Press Trade Paperback and NetGalley for the ARC of this novel. I thought this was really cute and a fun way to pass the time. I am a fan of Food Network cooking shows so it was a way to see behind the scenes a bit for the reality behind reality TV. The inn itself sounded lovely and seeing Molly and Robin grow apart and then back together was what I wanted from the book. The ending did feel abrupt but for the most part, enjoyable. 3.5 stars.
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Reviewed in the United States on December 14, 2025
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Bee#7
Fort Morgan, US
★★★★★ 5
A roller coaster ride!
Format: Kindle
Such an emotional story but did really enjoy the town this story was based in Eureka Springs, Arkansas. Such a peaceful beautiful town. Molly and Robin were married but split up and had lived apart for seven years. They owned the Hummingbird Inn and Molly came back there to stay for a while but realized Robin had moved back in there earlier. I loved the antics that these two played on one another and you could tell they really still loved one another but both had too much baggage. They were going to sell the Inn split the money and get the divorce but then feelings became involved. I received this ARC from Netgalley for free, and I am leaving this review voluntarily.
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Reviewed in the United States on June 24, 2025

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