This EMAX little servo can rotate approximately 180 degrees (90 in each direction) and works just like the standard kinds you're used to but smaller. You can use any servo code, hardware, or library to control these servos. This product includes a full set of common shafts as shown in the pictures, great for small mechatronic projects. It is excellent work with Arduino for the beginner.
Note!! red (+),brown (-), yellow (signal).