Transformer Variable (Autotransformer) Single Phase: Transformer Variable 0.2 KW with MST-0.2KVA Order Code for manually decreasing or manually raising the voltage with a current of 1 A with a constant output of 0 to 300 V Digital display for displaying the output voltage. Transformer Variable 0.5 KW with MST-0.5KVA Order Code for manually decreasing or manually raising the voltage with a current of 2 A with a constant output of 0-300 V Digital display for displaying the output voltage. Transformer Variable 1 KW with MST-1KVA order code for manually reducing or manually increasing voltage 4A with constant output 0 to 300 V Digital display for displaying output voltage.