This kit provides a mix of sensors, LED's and other items to get you started wokring with Arduino microcontrollers
All components come in a handy storage case
9V Wall Adapter
Male to Male Jumper Wire
Through hole resistors
Potentiometer With Big knob
Three digits 7-seg LEDs
The web site was easy to use, I found everything I was looking for. I like the one stop shop. I am telling all my friends about MCM Electronics.