This is a 12v 80w 12" Plastic fan with an on/off switch. The switch comes with 10' extension wire. The on/off switch will allow you to turn the fan on or off when needed. 10' of wire to place the switch in a convenient location. In winter months you can turn off the fan and it will extend the life of the fan motor. On/Off Switch helps turn off fan also on cold and rainy days to keep warm air and helps to install the fan safely with the switch off and turn it on after completing installation.