Product Model: C11<br> Product Size: 410*296*43mm/16.15*11.66*1.7in<br> Size of fan(large): 100*100*15mm*2pcs 3.94*3.94*0.59in*2pcs <br> Size of fan(small):70*70*15mm*4pcs 2.76*2.76*0.59in*4pcs<br> Rated Voltage: DC 5V