Is the ReefMaster RM-4K worth it for snorkeling?

For casual snorkeling and shallow dives, yes. It gives you 4K video and a wide 140° view for under $200. Serious divers will want a larger sensor and manual controls.

SeaLife rates the RM-4K housing for recreational diving depths, typically around 130 feet. Check the housing seal before every dive and rinse it in fresh water after use.

Does it shoot RAW photos?

No. Stills are saved as JPG only, at 14MP and roughly 5MB per file. Plan on editing JPGs rather than RAW files.

What comes in the box?

Expect the camera, underwater housing, and basic accessories such as a wrist strap and USB cable. A microSD card is not included, so buy one up to 128GB.

With only two stores listing it new, prices move little. The best new price was $169.99 at eBay as of November 4, 2026; watch for used or open-box listings for deeper discounts.

Where can I buy the SeaLife ReefMaster RM-4K Underwater Action Camera?

2 stores we checked sell it, including eBay, bhphotovideo.com.

SeaLife ReefMaster RM-4K Underwater Action Camera

Q: Where is the SeaLife ReefMaster RM-4K Underwater Action Camera cheapest?

At eBay, for $169.99, as of our latest check.

Best price now

$169.99at eBayObserved at 3:34 AM

Compared across 2 stores. Prices are checked against each store and labelled with when.

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Our take on the SeaLife ReefMaster RM-4K Underwater Action Camera

The SeaLife ReefMaster RM-4K is an underwater action camera built for snorkeling and shallow scuba, with a 140° fisheye lens and 4K video in a rugged dive housing. It shoots 14MP stills from a 1/2.3-inch CMOS sensor and adds time-lapse and electronic video stabilization. Its best new price is $169.99 at eBay as of November 4, 2026, with only two stores listing it new, so comparison shopping is limited.

Best forSnorkelers and shallow divers