This is the 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. Voltage: 5V Current: 0.3A Power: 1.5W Speed: 7500rpm<br><br>Noise: 22DBA Weight: 31G Colour: black Material: plastic Size: 51 x 25 x 13mm<br><br>Package Contents: 1 x Dual Cooling Fan 2 x heatsink(Sent at random, don't accept the specified)<br><br>Only 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.