1.solar fan 2.speed block to blocks 3.diameter fan blade 200mm 4.input power 5W 5.easy to use mini fan This product is the contingency charge fans, is not afraid of blackouts. With energy conservation it can save energy as much as 80 percent. Electricity consumption in general is 20% of Fortune fan. The main parameters: AC 220 v/50Hz, 110v/60Hz, battery; DC6v4-5Ah (lead acid batteries), light source; fluorescent tubes 11 w (LED20-32 teet)