Flush mount, simply screw into any e27 light socket, no wiring necessary, no professional electrician, quick efficient installation Power supply is a switch, switch the power supply once to change the working mode, there are three working modes: 1 light on, 2 fan work, 3 fan + light work together Built-in 3 fan is great for kids room and nursery, also can be used for living room,, bedroom, kitchen, study and more, brings you cool in hot Two-in-one design, it is not only a LED light with E27 lamp for head, but also the fan, along with a B22 to E27 adapter, allows you to extended connetcion with more devices, AC 86V-265V wide voltage Measures 10.2 inch in diameter and 4.7 " in height, built-in 30w cold white LED light, soft wind and low noise, adjustable in three gears