Important Parameter: 1/1.3 inch CMOS, 2.4μm pixel size, f/2.8 large aperture lens, 3840×2160@120fps video record (4K), 10 million pixels photo shooting; 155° wide-angle visual angle; 10-bit & D-Log M color expression; 360º horizon stabilization technology; 2.5h long-lasting battery life, supports fast charging; bare machine is waterproof at 18m underwater, up to 60 meters match with the waterproof case; Supports wifi and mobile phone hotspots connection, BLE 5.0 bluetooth 【Dual Touch Screens at Front and Back】The front features a 1.4-inch LCD screen, while the back is equipped with a 2.25-inch touch screen, all supports touch control, easy to handle, and conveniently adjust parameters while taking selfies without flipping the camera 【4K Ultra-clear Image】Adopts 1/1.3-inch sensor, 2.4μm pixel size, f/2.8 large aperture lens, can handle both high light ratio and low-light environment shooting with ease, recording 4K@120fps UHD videos, capture the details of light and shadow, restoring true colors, easily create a sense of layering 【Compact, Portable and Flexible Usage】Camera weighs 145 grams, size: 7.1 x 4.5 x 3.3cm, small body, can be put in a pocket for easy carrying; Magnetic quick-release design, while ensuring a firm connection, can achieve flexible conversion among multiple camera positions and multiple accessories, quickly switch between different perspectives to capture rich, capture rich and outstanding images 【Multi-mode Stabilization】3 stabilization technology: 360º HorizonSteady, HorizonBalancing, Super Strong Stabilization 3.0(RockSteady 3.0), effectively counteract the shaking of the camera in all directions, improve the stability of camera shooting, even experiencing severe jolts or 360° rotation, the picture can always remain stable 【Color-temperature Correction】Equipped with a color temperature sensor, it can present true color temperature whether in complex indoor or outdoor lighting environments or in diving scenarios of different depths, can be shared directly after output, eliminating the need for complicated post-color adjustment operations 【Excellent Waterproof Performance】The bare machine is waterproof to a depth of 18 meters and supports wet hand operation, with the waterproof case, can support up to 60 meters, allowing you to freely explore the underwater world and record the beautiful scenery underwater 【Cold-resistant and Long-lasting Battery】1770 mAh for original battery, support fast charging, offers a long-lasting battery life of 2.5 hours, even when the temperature drops to -20℃, can still record continuously for 150 minutes, even if a world of ice and snow, you won't also miss any wonderful moments; (pls note: the two additional batteries in the accessory package are non-original batteries) 【Custom Mode & Quick Switch Keys】Save the commonly used shooting parameters in the C1 to C5 shooting mode list, Even without looking at the screen, can switch between different preset modes by pressing the QS button and prompt voice, it is convenient to call up and enables efficient creation 【Accessory Add】A series of practical and easy-to-use accessories will help to fully meet the shooting needs of various sports scenarios and capture the best state The 120fps high frame rate is compatible with 1080p, 2.7K 16:9, and 4K 16:9 video specifications. The 155° FOV supports up to 4K/60fps recording and requires stabilization to be disabled. The Horizontal-Vertical Protective Frame is required for vertical shooting. Before using the action camera, close the battery cover and USB-C port cover, and tighten the Glass Lens Cover. It is recommended to use the Waterproof Case for long-term underwater shooting or in environments with high water impact pressure. Osmo Action 4 and its Waterproof Case have an IP68 rating. Do not use the camera in hot springs, extreme underwater environments, or let it come into contact with corrosive or unknown liquids. Tested in a 25°C (77°F) lab environment at 1080p/24fps (16:9) with RockSteady on, Wi-Fi off, and screen off. This data is for reference only. Tested in a 25°C (77°F) lab environment using a DJI 30W USB-C Charger, with photo/video functions disabled and screen off. This data is for reference only. Tested in a -20°C (-4°F) lab environment at 1080p/24fps (16:9) with RockSteady on, Wi-Fi off, and screen off. This data is for reference only. For the full version of these notes, refer to "Product guides and documents.