KY-011 2 color led module is a very basic module. It is basically a 2 color led on-board Common Cathode Green Red LED. There are 3 pins on the board.one is labeled G which you should connect to the ground. The other 2 are connected to a resistor (small one, 330 ohms or something like that) and from there to the inputs.

Specifications:

• Color: Green + Red
• Diameter: 5mm
• Package-Type: Diffusion
• Voltage: 2.0-2.5v
• Current: 10mA
• Viewing angle: 150 degree
• Wavelength: 571 +644 nm
• Luminous intensity (MCD) :20-40; 40-80
• Stent type: long-legged