OEM Cooling Fan for the ThinkPad T420 laptop series, this is the cooling fan for CPU processor. If your PC fan is running very loud or not functioning then a replacement may be needed. The fan uses an integrated flex cable to connect to the mainboard. The cable connects via 4-pin connector making it a plug and play replacement module, NO soldering is required, Attaches to your existing heatsink. Specifications: Direct Current: DC 5V / 0.35A Color: Black Connection: 4-pin 4-wires Manufacturer Part Number(s): LNVN-000000B48253, KSB06105HBFRU: 04W0627, 04W0628, 04W0407, 04W0408, 04W0409 Reference list of compatible with Len0vo Laptop Models: - ThinkPad T420 - ThinkPad T420i What's in the Box 1x CPU Cooling Fan