It is designed as a bead annealing kiln (note the insulated hinged flap door).
When the brick insert is in place, it can also be used for fusing, slumping and melting!
More information can be found here: http://www.arrowsprings.com/html/kilns_controllers.html
And the manual here: http://www.arrowsprings.com/DownloadFiles/Arrow_Springs_Oven_Manual_01-22-09.pdf