Diamond LED Light Water Submersible, Multi Color, 2-Inch, 12-PieceFNS0005730MC
Each lamp is powered by 2 CR batteries which are included.
Turning the lamp on and off is easy - just push a button.
It has 3 light modes: fast strobe, slow strobe, and always on.
Multi-Color has several colors modes.
Length: 2 inches
Width: 1-1/2 inches
Pack: 12 pieces