These are considered Sub-miniature servos The servos are made by Hitec. On all Hitec servos the Black wire is 'ground', the Red wire (center wire) is 'power', and the yellow (third) wire is 'signal'. This servo has a Hitec/JR connector which mates directly with a 0.1" 3-pin header. This servo comes with servo arms.
These are HiTec HS-422 Servos for use in any application.
100 pack of black UV resistant nylon with flexible tape section, pull tight and does not come undone. Length 11 inches.
This package includes all the items you would need to make a robot drive to GPS waypoints autonomously.