From the DJI Press release:
Every new iteration of a DJI product is an opportunity to explore one question: What can be done better? One unmistakable result of this exploration with Mini 3 Pro is a completely new structural design that brings several performance enhancements. The arms and propellers have been adjusted for more aerodynamic flight that increases flight time. This new design also mounts forward and backward dual-vision sensors at the very front of the drone, broadening sensing range for even safer flight. A complete gimbal redesign unlocks more camera angles than ever, enabling movements like tilt-up shots and vertical shooting. With a fresh, new look, DJI Mini 3 Pro truly unlocks more creative possibilities.
Obstacle Sensing for Safer Flight
In a first for the Mini drone series, DJI Mini 3 Pro features Tri-Directional Obstacle Sensing, consisting of forward, backward, and downward visual sensors. The forward and downward sensors have a wider field of view, providing seamless coverage for better route planning and environmental awareness. These sensors also enable Advanced Pilot Assistance Systems (APAS) 4.0, which automatically detects and finds a safer path around obstacles during flight.  In addition, these sensors also enable the entire FocusTrack suite, which allows users to select a subject that the drone automatically keeps within the center of the frame during flight while automatically planning a safe flight route. Thanks to its upgraded sensing system, DJI Mini 3 Pro is the first of the Mini lineup to integrate APAS and FocusTrack.
A Camera System for Pro-Quality Content
DJI Mini 3 Pro also brings a completely enhanced imaging system. A 1/1.3-inch CMOS camera sensor has dual native ISO, a capturing technology previously only available on cinema and some micro single cameras. It also has an aperture of f/1.7 and shoots images at up to 48MP and video at up to 4K/60fps. To help capture high-quality easy-to-upload content, the camera rotates 90 degrees for True Vertical Shooting, creating incredible photos and videos in portrait orientation without quality-cutting image zooming and cropping. For the most vivid detail, HDR video recording is available at frame rates up to 30fps. A Normal color profile is available for quick in-app editing, while D-Cinelike allows for more post-editing possibilities. Digital video zoom at up to 2x is available in 4K, 3x in 2.7K, and 4x in Full HD. Among the key pieces of user feedback we’ve applied, DJI Mini 3 Pro also has improved image performance with 2.4μm pixels that capture more image detail, which is especially helpful in low lighting and night.
Extended battery life and transmission distance
Even though DJI Mini 3 Pro is under 249 grams, it still arrives with extended flight time. At a maximum flight of 34 minutes, Mini 3 Pro can capture more landscapes and destinations on a single charge. To give users more choice, Mini 3 Pro also introduces an extended flight battery option for the first time in DJI drone history. The Intelligent Flight Battery Plus allows for a maximum flight time of 47 minutes, an unprecedented capability for a drone of this size.  Pairing perfectly with this extended flight time, Mini 3 Pro features the O3 transmission system, which delivers a crisp 1080p live view from a distance as far as 12 km.