square shape WS2801IC LED Pixel module

Iron case 'pixel ' contains 4 RGB LEDs and a controller chip soldered to a PCB. 

The pixel is  'flooded' with epoxy to make it waterproof. 

There are two ears with hole on each side for screw installation

The pixels are connected by a 4 pin cable cable. +12VDC,data,clockand GND.

Each dot is digitally controlled, with an internal 8-bit PWM LED driver
(24-bit color for 16 million different shades)

with a 120 degree beam width. All of the LEDs are controlled at once
so you cannot have one pixel with the three LEDs different colors.
(Color control is per single 4-LED pixel only) The total max brightness
of all LEDs is about 6000mcd. 

35mmx35mm 

8cm  apart from each module and 20 pieces on the strand

12VDC power, 80mA maximum per pixel (LED on full white)

Each strand has two JST SM 4-pin connectors so you can connect
multiple strands in a row.