2Set for 4B Accessories: 1 set x Dual Cooling Fan & 1 x for 4b Case<br> This is the version dual fan for B+ module, 7mm 9-page cooling fan, heat-dissipating sticker on the back, simple and practical. More importantly, the noise is only 22DBA, other 's fan is over 30 , 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 B/3 B+. It 't make you disappointed.<br> Voltage: 5V<br> Current: 0.3A<br> Power: 1.5W<br> for 4b Case:<br> Small formed cooling case that especially keeps the for safe.<br> Supports up to the for 4GB model.<br> Provides access to the Camera module, Display Module, GPIO pins, and PoE pins.<br> The perfect for Case that keeps your Pi cool even at maximum performance.<br> Colour:gray<br> Material:Aluminum alloy<br> Dual Cooling Fan:<br> Speed: 7500rpm<br> Noise: 22DBA<br> Colour: black<br> Material: plastic<br> Size: 51 x 25 x 13mm<br> Package Contents:<br> 1 x Dual Cooling Fan<br> 2 x heatsink(Sent at random, don't accept the specified)<br> 1 x for 4b Case<br> Only the above package content, other products are not included.<br> Note: Light 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.