This little yet powerful motor is ideal for hundreds of electrical experiments and projects. Voltage requirements are 1.5 to 3 DC volts. RPM is between 7,000– 11,000. Each unit also incorporates 12” red and black connector leads. Ages 7+. This box is a great “class pack” or on a store shelf. Box includes 20 motors and a pad of 25 tear off informational sheets.