4-pin interfaces, red positive levels, black negatived levels, yellow speed measurement, basket speed regulation function, wire length of 33cm, mainly used for computer, server cooling, and more Compact and powerful, suitable for DIYer inflatable devices, amplifier cooling, car seats, computer cases, hard drive slots, electronic motherboards, server rooms, and other electronic products 97mm x 33mm double ball 4-pin computer centrifugal blower 12V high air volumes DIYer exhaust ventilation cooling Double ball bearings, suitable for long-term use. The service lifespans is up to 50000 hours. High volumes centrifugal fan suitable for computer cases, CPUs, and GPUs, 12V cooling fan, can be used for exhaust cooling in gaming computers and cars Compact 97mm centrifugal design, 7500RPM, 300CFM cooling fan, can provide high-speed airflows for electronic products, household appliances, and instruments, Manufacturer: Cnrfeoap