AUcontrols.
DC Motor Speed Controller, Mod. ASCB1-1, NEMA 1 
Made in USA.
General purpose drive is designed for use with permanent magnet or shunt wound DC motors.
HP: 1 HP.
Input 110 ~ 130 VAC. 50/60 Hz. Single Phase, 
Output: 90 VDC / 12 Amp. Max. Field: 50/100 VDC 1 Amp.
1 Year Warranty Under Normal Operation Conditions.

Dimensions: 7" X 5" X 4"