This is just about the cutest, tiniest little micro servo we could find, even smaller than the 9-gram micro servos we love so much. It can rotate approximately 180 degrees (90 in each direction) and works just like the standard kind you're used to but much smaller. You can use any servo code, hardware, or library to control these servos. Good for beginners who want to make stuff move without building a motor controller with feedback & gearbox, especially since it will fit in small places. Of course, it's not nearly as strong as a standard servo. Works great with the Motor Shield for Arduino or by just wiring up with the Servo library. Comes with a few horns and hardware.