Introduction: The product is assembled, and the product contains two 18650 lithium batteries.? The structure of 3D printing is rough, but it does not affect the use.? The product includes six SG90 servos, one is responsible for turning the eyeball left and right, one is responsible for turning the eyeball up and down, two are responsible for the opening and closing of the upper eyelid, and two are responsible for the opening and closing of the lower eyelid, they can move together. A potentiometer knob is responsible for the size of the eye opening, and an X Y dual-axis joystick controls the position of the eyeball along with a button for blink controls.