DC Input: 12VSimulator Size: 11.5x20mm (connector included)Suitable for all 4 Pin Fan.NE555 timer generate 6600-7300 RPM fan signal.Triple-cornered mark of the fan simulator board match with the control board fan connector Triple-cornered mark. Material:plasticcolour:BluePackage Contents:2 * Fan Simulators/5 * Fan Simulators/1 * Fan SimulatorOnly 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 +/- 1-3cm.