Removable Li-ion rechargeable battery – 900 mAh / 3.8V / 3.I'm with phill on the split screen thingy its hard enought to see a 6' screen let alone making it 3'.Time lapse shooting at set time intervals – saves as video file or series of still images.Focus from 12” (30cm) to infinity (10X Close-up Lens or Super Macro Lens optional accessory).Compact design for easy handling and lightweight travel.Expandable memory using micro SDHC/SDXC memory card up to 128GB.Wi-Fi – wirelessly preview, download and share pictures/videos to smart phone or tablet with “SeaLife ReefMaster” app (free download from Google Play Store or Apple App Store).Easy 4 button controls for easy operation.Underwater color-correction modes – Underwater Deep for diving and Underwater Shallow for snorkeling.140 degree Fisheye Lens – Get close to your subject and still fit everything into the picture.40m/130ft compact underwater housing with removable inner camera.

4K Ultra HD Video 30fps and 1080p HD video 60 fps.

14 megapixel Panasonic® CMOS image sensor for sharp colorful pictures.

Its 2.0” TFT color LCD screen creates a sharp and easily visible display on the small camera. 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 or super macro lens.

It also has a time lapse function – shooting at set time intervals and saves as video file or series of still images.

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 all of your video content. The waterproof housing encases the small inner camera, and also stores a powerful drying agent called “Moisture Muncher” next to the camera that prevents internal fogging caused by heat and humidity trapped inside the housing. The easy to hold ergonomic housing was especially designed for use underwater, while the housing is easy to hold and use even with one hand, the tough enclosure also features a unique closing system – a “Pressure Lock” thumb screw that exerts the optimal amount of pressure on the housings O-ring seal.

Reefmaster garmin