The SFT4 electrode dryer is made by Sherman, the brand speaks for itself, it's quality and reliability is well known among welding specialists.
 
It is used for proper storage of electrodes/welding rods. Due to the lightweight construction it is recommended for less intensive use. Dryer is equipped in a thermostat that turns off the heater when it reaches appropriate temperature, and switches off a light visible on a front panel.
 
More technical information can be found on the right hand side