With this little kit, what you see here is what you get... The LED changes colour at the supply voltage set by the trimpot! The LM336Z-2.5 voltage reference ensures stable performance over temperature.
Operating voltage: 6V to 30V DC (no other power source needed)
Current consumption: Depends on supply voltage- around 10mA at 12V.
LED colours: Green / Red
Dimensions: 1.0 x 1.0 inches (25 x 25mm)