This is a dual fan cooling expansion board for . This expansion board is compatible with all versions of pins, and all pins can be used GPIO is fully led out, pins are clearly marked, and heat dissipation does not affect development and use The fan adopts active heat dissipation installation method, and the heat dissipation effect is passive heat dissipation The LED light and fan are controlled separately, and the LED light is welded on the back of the board, which not be dazzling when used at night With hexagonal copper columns, the height difference between the heat sink and the chip is increased, the negative pressure area is expanded, and the heat dissipation is more effective. The fan can reach a stable working state after running for five minutes. The temperature of the gradually rises after it is turned on, so it does not affect the use at all Rated voltage VIN: DC5V Maximum power: 1W Rated current VIN: 0.2A Operating temperature: -10-50 Positioning hole size: 3mm Colour:black Material:plastic Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Package Contents: 1 * Cooling Fan Expansion Board Only the above package content, other products are not included. Note: Light reflection 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.