Hi, guys. Welcome! Special gifts for my NEW friends who joints my networks,1. We can offer FREE samples for your testing.2. We can help to analyze your current fan samples by our own comprehensive testing equipments, such as Acoustic Chamber, Wind Tunnel Machinery, ect..3. Professional cooling solution against your project is pleased to offer if needed. I am Annie and have started my work in Chenghui Electronic from the beginning of 2017.I loved my work and realized how important dc cooling fan to the working electronic components would be after the CPU fan of my PC stopped to work at one day of two year ago.I was writing my long blog with my PC and going to finish soon. Suddently the computer crashed. Oh, my god. How terrible! I screamed angrily......As I wrote the article on the internet without saving. I sent host computer to repair shop and the people told me the fan stopped to run. CPU easily overheated and stopped to work due to self-protection function. And I found out that the fan was fully covered with dust after disasembly. I asked our engineer to help me build a fan samples and replaced into my PC. So far, the fan works stably without big noise. For a dc fan, excellent dustproof and bearing structure with good-quality oil, to a large extent, determine the service life of of the fan. Our engineers are engaging in studying oil storage structure of the fan for years and we already got some patents. Want to know more about our UNIQUE fan structure and get your suitable dc cooling fan? Just contact us for your cool idea to keep your world cool. Haha..........Call me: +86 13538992575Skype: anniechgz@gmail.comEmail: anniech@dcfanmfg.comMore Information: Vsit our web www.cchv-fan.com . And if you want to know more about us or want to get our e-catalogue, welcome to contact by email.