General description 3X for 5V Nano Cooling Fan features a 4PIN anti-reverse connector and PWM speed adjustment, designed to provide powerful airflow for efficient cooling. Technical specifications Voltage: 5V Connector: 4PIN anti-reverse Size: 40x40x20mm Material: Plastic Package Contents 3 Cooling Fans Other information Note: Light reflection and different displays may cause the color of the item to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.