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Your cart is empty. The SeaLife RM-4K offers brilliant 14mp still images and vivid 4K video in an incredibly small package that's easy to hold and use alone or with attached lights like SeaLife’s available range of Sea Dragon Photo and Video lights.
The ultra-compact removable inner camera and a robust external housing mounts easily to a light or light tray. The easy, 4-button control system is easy to navigate and makes capturing underwater images and video an effortless process. The ReefMaster offers Wi-Fi sharing ability, so you can wirelessly preview, download and share pictures & videos to a smart phone or tablet with the free ReefMaster app.
The ergonomic housing is especially designed for use underwater, and is easy to hold and use even with one hand. The tough and durable housing features a unique closing system with a "Pressure Lock" thumb screw that exerts the optimal amount of pressure on the housings O-ring seal. The waterproof housing encases the small RM-4K inner camera, and holds a powerful drying agent capsule called "Moisture Muncher" next to the camera that prevents internal fogging. With the expandable memory of the ReefMaster RM-4K, you can use Micro SDHC memory cards up to 128GB, ensuring you have room to shoot & save your video content. The ReefMaster RM-4K has a time lapse function, shooting at set time intervals and saves as video file or series of still images. Lighting is easy, use the ReefMaster RM-4K with Sea Dragon constant underwater LED photo/video lights (or other LED light sources). There's no flash or cable to sync to an external strobe. Simply turn your light on and adjust the intensity based on the subject, conditions and distance.
The compact RM-4K is easily expandable with popular SeaLife accessories, including one or two Sea Dragon Photo/Video/Dive lights, and available 10x close-up, super macro or wide angle lenses. The 2.0" TFT color LCD display offers 230K resolution and is sharp and visible in all light conditions.
MS
Reviewed in the United States on January 25, 2025
love this little camera! works great, fun to use
Karen
Reviewed in the United States on September 15, 2024
Easy use great pictures and videos
Rachel
Reviewed in the United States on July 28, 2024
I purchased this product on a recommendation from a friend. It never functioned well. The view screen constantly turned off making use while swimming difficult. Then on the third use the case leaked and the camera was no longer functional. What kind of underwater camera is not waterproof? Waste of money
c
Reviewed in the United States on June 6, 2024
This worked great on our trip to the Bahamas. Great footage while snorkeling
Customer
Reviewed in the United States on August 29, 2023
I love the compact size an the overall durability of the build of this camera and I was very excited to get it so quickly. However as soon as I opened it to start learning how to use it I realized I could not take any pictures at all because there was no memory card inserted. I did not remember reading or seeing anywhere that it was a required item that was not included. I quickly went back on Amazon to order one and it will arrive today. I can't wait to use this on my dive trip this coming week!
sonja skendzic
Reviewed in the United States on September 5, 2022
I had high hopes when purchasing this camera. Unfortunately, if I could give this camera a 1/2 star I would. The camera flooded day 1 of our vacation. Not one picture was taken from it. So as far as picture quality and battery life, I have no idea. As for water resistance, I think I would have better luck with a ziplock bag.
Occasional_Purchaser
Reviewed in the United States on December 7, 2022
The built-in color correction works well. Easy to change the menu options underwater with gloves. The MP4 files are half the size of MOV from other brands and I cannot tell the difference in the quality. Note, no camera is 100% perfect, but the Sealife RM-4K is much better than a GoPro. I returned two GoPros before getting the Sealife and I won't go back.
Annah-Claire Summerlin
Reviewed in the United States on June 17, 2021
Got this for taking photos while diving. It is a basic point and shoot camera—just like a GoPro, but GoPro has stabilization that helps with catching clear pictures in the current as well as better video quality. If you are considering, I would compare with a GoPro and go with that!
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