DJI O4 Air Unit (digital video): most popular and where they are cheapest

A list ordered by popularity among FPVBuilder users, with the lowest price available today at stores that have it in stock. Open a part to see its specifications, its compatibility and every store that sells it.

Today there are 10 in-stock options, from $128.48 to $399.99.

Prices as of 2026-10-31.

PartSpecificationsFromStores in stock
DJI O4 Air Unit Output type: DJI O4 · Supported cells: 1S-3S · Mounting pattern: 30.5x30.5, 25.5x25.5 · Voltage: 7.4 V (estimated) $139.99 5
DJI O4 Air Unit Pro Output type: DJI O4 · Supported cells: 2S-6S · Mounting pattern: 20x20, 25.5x25.5 · Voltage: 7.4 V $219.99 5
Drone Nerds (SHIPS 5/12) DJI O4 Air Unit Pro - Digital Transmission System Output type: DJI O4 · Supported cells: 2S-6S (estimated) · Mounting pattern: 20x20, 25.5x25.5 · Voltage: 7.4 V (estimated) $289.00 1
DJI O4 Wide Air Unit Output type: DJI O4 · Supported cells: 1S-3S (estimated) · Voltage: 7.4 V (estimated) · Output power: 25 mW $128.48 1
Flywoo DJI O4 Wide Air Unit (MP66) Output type: DJI O4 · Supported cells: 1S-3S (estimated) · Mounting pattern: 30.5x30.5, 25.5x25.5 · Voltage: 7.4 V (estimated) $189.99 1
DJI O4 Air Unit Pro Transmission Module Output type: DJI O4 · Supported cells: 2S-6S (estimated) · Mounting pattern: 30.5x30.5, 20x20 · Voltage: 7.4 V (estimated) $169.00 1
WalleFPV Naked O4 Pro Air Unit Output type: DJI O4 · Supported cells: 2S-6S (estimated) · Voltage: 7 V · Output power: 1000 mW (estimated) $399.99 1
DJI O4 Air Unit FPV Lufteinheit Pro Übertragungsmodul Output type: DJI O4 · Supported cells: 2S-6S (estimated) · Voltage: 7.4 V (estimated) · Output power: 1000 mW (estimated) $199.98 1
DJI O4 Air Unit Pro (MP66) Output type: DJI O4 · Supported cells: 2S-6S · Mounting pattern: 20x20, 25.5x25.5 · Voltage: 7.4 V $260.99 1
DJI O4 Air Unit Pro Transmission Module Output type: DJI O4 · Supported cells: 2S-6S (estimated) · Voltage: 7.4 V (estimated) · Output power: 25 mW $199.98 1
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How this list is made

The list builds itself from the catalog: only parts in stock at some store and with enough data get in. The order is popularity among users, not commission: stores do not pay to rank higher.

Frequently asked questions

How much do these parts cost?
Among the 10 most popular in stock, prices run from $128.48 to $399.99.

Which one is the cheapest right now?
Today the cheapest in stock is DJI O4 Wide Air Unit, from $128.48.

How is this list ordered?
By popularity among FPVBuilder users, not by commission or price.

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