The DJI Osmo Action 4 camera has a bigger image sensor compared to the older Osmo Action 3 and a higher price, starting at $399 for the standard combo.
DJI Osmo Action 4 4K Action Camera Standard Bundle Gray CP.OS
DJI Osmo Action 4 Standard Combo
DJI's new GoPro competitor launches at $399
DJI Launches Latest 4K Action Camera: Osmo Action, 50% OFF
DJI Osmo Action 4 Camera Specifications And Photos Leaked
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DJI's Osmo Action 4 launches at $399 - The Verge, camera dji