2Set for 4B Accessories: 1 set x Dual Cooling Fan & 1 x for 4b Case 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. Voltage: 5V Current: 0.3A Power: 1.5W for 4b Case: Small formed cooling case that especially keeps the for safe. Supports up to the for 4GB model. Provides access to the Camera module, Display Module, GPIO pins, and PoE pins. The perfect for Case that keeps your Pi cool even at maximum performance. Colour:gray Material:Aluminum alloy Dual Cooling Fan: Speed: 7500rpm Noise: 22DBA Colour: black Material: plastic Size: 51 x 25 x 13mm Package Contents: 1 x Dual Cooling Fan 2 x heatsink(Sent at random, don't accept the specified) 1 x for 4b Case Only the above package content, other products are not included. 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.