NiMAR's 3 lines are:
BASIC - CLASSIC - SURF (PRO)
What's the difference between the 3 NiMAR Water Housings?

BASIC Water Housing
The Basic Water Housing allows you to exclusively use the mechanical shutter.

The rest of the controls must be preset or set to Auto Mode before the camera is placed in the housing.

Pistol Grip and Back Plate with more controls can be purchased later
2nd removable side grip handle optional.

CLASSIC Water Housing
The Classic Water Sports Housing was designed to allow you to capture striking images and videos during aquatic sports and scuba diving otherwise known as deep sea diving.

The housing features a depth rating of 197'(60m) to shoot well below the surface or at shallower depths for activities such as surfing or water-skiing. In other words, you can shoot at depths of 197'(60m) while scuba diving or near the surface while recording sports or in a swimming pool.
Mechanical controls, including push buttons, dials/knobs, and a lever, enable access to camera functions.
2nd removable side grip handle optional.



What's the difference between the Classic Water Housing and a Regular Underwater Housing?


SURF (PRO) Water Housing
Same features as Classic model + Removable Pistol Grip allows for dedicated shutter control independently.
Depth Rating: 98ft (30m)

Mechanical controls, including push buttons, dials/knobs, and a lever, enable access to main camera functions.
2nd removable side grip handle optional.



ATTENTION:
ALL WATER HOUSINGS REQUIRE THE ADDITION OF A COMPATIBLE LENS PORT SYSTEM FOR WATERPROOF OPERATION

WHAT IS THE MOISTURE ALARM?
It is a device who alerts you in the unlikely event of a breach in the waterproof seal, giving you time to prevent damage to your camera and lens.