This is the versatile Hitec HS-425BB servo. This little guy is able to take in 6 volts and deliver 57 oz-in. of maximum torque at 0.16sec/60°.
This high quality servo is perfect for your mechatronic needs and if you are looking to get into robotics, this is where to start. The HS-425BB servo comes standard with a 3-pin power and control cable and all hardware listed below: