Material: metal + PCColour: BlackFeaturesLess than±0.5% Reglation220/400 VAC Programmable InputRugged Compact DesignWith Under Frequency Protectionoft Start Voltage Ramping SuppressionBuit-in High Capacity 15Amp FuseSpecifications:Sensing Input Voltage: 220/400VAC, 1 phase 2 WirePower Input Voltage:180~240V, 1 phase 2 WireOutput Voltage: Max 90V dc @240V ac inputCurrent: Continuous 6AIntermittent 12A for 10 secsResistance: Min.10 ohms Max.100 ohmsVolts Regulation: Less than±0.5% (with 4% engine governing)Voltage Build-up:Residualvolts at AVR teminalGreater than5VACSoft Start Ramp Time: 3 secondsExternal Voltage Adjustment: ±7% with 1 k ohm 1 watt trimmerUnit Power Dissipation: 8 watts maximumThermal. Drift: 0.05% per °C chage in AVR ambientUnder Frequency: 60Hz system presets knee point at 57Hz(Factory Settings) 50Hz system presets knee point at 47HzOperating Temperature:-40°C to 65°CStorage Temperature:-40°C to 85°CRelative Humidity:Less than95%Package Included:4 x GAVR-20A Automatic Voltage Regulator4 x InstructionsOnly 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.