0-3X V or Hz limiting 0.25percent Voltage Regulation Accuracy 0.5percent accuracy up to 40percent (harmonics associated with 6 SCR load) 20 standard stability selections and one customizable selection 63Vdc 7Adc PWM output Accessory input Alarm Contact Output URus recognition per UL 508 and Standard C22.2 No. 14 DNV Standard for Certification 2.4 Five generator protection functions including Loss of Sensing transfer to manual LED Annunciation of operating conditions Manual Mode (Field current regulation) Microprocessor based Nominal sensing inputs of 120, 240, 480 and 600Vac Overexcitation limiting Paralleling input from 1 or 5A CT secondaries Power Input from 50 or 60Hz shunt connections or PMGs operating at 50 to 400Hz Setup via PC using BESTCOMS software (included) Color: Black Material: Metal Package Contents: 1x AVR Excitation Voltage Regulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is 1-3cm.