This is the new version dual fan for Raspberry Pi 4 B+ module, 7mm 9-page cooling fan, heat-dissipating sticker on the back, simple and practical. More importantly, the noise is only 22DBA, other brand"s fan is over 30 DBA, you don"t have to worry about the noise any more. So don"t hesitate to choose our mini super quiet cooling dual fan for your Raspberry Pi 4 B/3 B+. It won"t make you disappointed.Size: 51mm x 25mm x 13mmVoltage: 5VCurrent: 0.3APower: 1.5WSpeed: 7500rpmNoise: 22DBAWeight: 31GSituable for Raspberry Pi 4 B / 3B+Colour: blackMaterial: plasticPackage Contents:1 * Dual Cooling Fan kitOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. About Shipping: All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.