The DC machine can use DC transformation into mechanical energy. The structure is composed of a stator and a rotor. The is smooth and bright in color. Working range: 1.5-12.0 Normal voltage: 3V-12V Color: silver MATERIAL: metal Size: 3.2cm Package includes 10X motor Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3 cm.