AS440, Stanford AVR, Stanford regulator board. Technical parameters: Voltage build: When remanence than 4V25Hz automatically build pressure input power: AC 190 ~ 260V 50/60Hz Output: 90V DC Maximum Voltage (when the input AC 207V) current 4A (continuous) 6A10S (instantaneous) frequency compensation: built-in engine rpm decreases the frequency of the output voltage fall protection circuitry regulation: better than 1% SX440 features: the SX460 in parallel on the basis of increased regulation required DR00P and external TRIM control, is currently the most the most practical parallel-type AVR.