The DJI O4 Air Unit Lite weighs just 8.2 grams and allows for a 10km range, 4K@60fps onboard recording, and low-latency HD video transmission.
It is a game-changer for cinewhoops and lightweight builds.
While the “Lite” edition, weighing only 8.2 grams, is intended for ultra-light Whoops, the Pro edition is intended for long-range FPV drones.
The O4 Lite is a good performer, but lacks in some areas, not least the absence of an onboard D-Log M color profile.
Onboard storage lasts for less than an hour of recording, meaning a laptop is required for longer flights.
It also can't be powered directly from the 1S batteries it is sold as being compatible with.
The VTX's lack of heat sink can lead to overheating and its minimalistic design exposes components, making it more susceptible to damage and short circuits.
The Walksnail Avatar HD Mini Lite is more suitable for 1S systems and has a wider FOV, as well as costing $20 less than the DJI offering.
Despite its limitations, the O4 Air Unit is a good choice for its affordability and compatibility with the DJI ecosystem.
Compatible frames include those from BetaFPV, DarwinFPV, sub250, Flywoo and Happymodel.