Tripod Inon Head on hotshoe mount with rotatable top

The built-in ball head supports wide movable range (360-degree rotatable and 180-degree back and forth) yet with its compact body.

A Shoe Base equipped with "1/4-20 UNC" male screw on its head adapter. 
The Shoe Base 1/4-20UNC can be directly screwed on a conventional digital camera or underwater housing equipped with "1/4-20UNC" female screw hole at the bottom. An action camera or compact digital camera can be installed on an accessory shoe of an underwater housing to shoot/film simultaneously.