Anyone know what is Temperature Sensor + Relay Module for Arduino for?

Using Arduino Sensors
#1

Are the Temperature Sensor and Relay Module separated? how to control?

Thanks

#2

what module r u talking off? what do u want to control with that relay?

#3

RIDDICK: what module r u talking off? what do u want to control with that relay?

http://dx.com/p/2-channel-temperature-sensor-relay-module-for-arduino-blue-151564?item=15

I can control small PC fan,

#4

it seems like it is controlled by temperature... there is no other way to turn the relays on or off... the temperatures can b controlled by the potentiometers...

#5