Connector : 3pin femaleWARNING: DUE TO THE EXTREME HIGH SPEED OF THIS COOLING FAN, PLEASE EXERCISE EXTREME CAUTION WHEN YOU POWER UP THE FAN, AND MAKE SURE ABSOLUTELY NOTHING (SUCH AS YOUR FINGERS IF YOU ARE HOLDING THE FAN) CAN GET CAUGHT BETWEEN THE FAN BLADES WHEN THEY ARE ROTATING. THANK YOU VERY MUCH. NO FULL REFUNDS OR RETURNS to customers who decided they simply do not want the product anymore. There will be a 15% re-stocking fee for returned or refunded products. Returned retail packaged product opened by the customer is non refundable. We will replace any Dead-On-Arrival (DOA) item if you contact us within 2 weeks from the day you receive the merchandise. There is a Warranty of one year after the product is received. Warranty is VOID after one year or if product is damaged by any user misuse.BRAND NEW NEVER BEFORE USED. SHIPS BARE WITHOUT RETAIL PACKAGE. ITEM IS SHIPPED WITH PACKING MATERIAL.