35x35mm Square WS2801 Digital LED Pixels, Strand of 20, 12V

Working Voltage: DC12V
LED QTY: 4 pcs SMD5050 per metal pixel square
LED Type: SMD5050 RGB
IC type:WS2801IC ( WS2801 datasheet )
LED view angle: 120 degree
Waterproof IP grade:IP65
Emitting Color: RGB
Power Consumption: Max 1.44W/pcs
Brightness Level: 256 level
Dimension: 36mm x 36mm 

The pixels are connected by a 4-conductor cable. +12VDC, ground, data and clock. Data is shifted down from one pixel to the next so that you can easily cut the strand or attach more onto the end.

Each dot is digitally controlled, with an internal 8-bit PWM LED driver (24-bit color for 16 million different shades). The pixels must be clocked by a microcontroller, we have an example code linked below that works on an Arduino, it should be simple to adapt it to any other microcontroller.