The product is a new high performance AVC DBTB0428B2G 40x40x28mm 4Pin JST1.25 20cm 12V 1A server/power supply fan. This case fan is designed to provide efficient cooling for servers or power supplies, with a power connection of 4 pins(JST 1.25mm) for easy installation. The fan operates at a voltage of 12V 12W, ensuring optimal performance for maintaining optimal temperature levels in computer systems with PWMm mK I.