AVR R449, 50/60Hz.110~600V. for leroy somer alternator AVR-LS R449 Specially for Leroy Somer alternator/generator(C6/4-AREP excitation with AVR-R438 or AVR-R448),Technical specificationInput ... .5%We also have R230, R438, R448, R449, SX460, SX440, MX341, MX321, SR7, UVR6, SE350, M16FA655A, M40FA640A/A, VR6/K65-12B. AVR R449