ProtoSnap - LilyPad E-Sewing Kit Retail
From Geeetech Wiki
Overview
This board contains three parts:A Button battery who supplies 3.3v voltage,five LED lights are used to display part ,the third part is two switches.The working principle of this board is simple and it is very easy to be used.When you want to use it you should put a button battery to the battery card slot and turn the S2 on,then you can see LED1,LED2,LED3,LED4 are all on.when you press the S3 button the LED5 is on, if not the LED5 will off.