Material: metal + PC Colour: Black Features Less than±0.5% Reglation 220/400 VAC Programmable Input Rugged Compact Design With Under Frequency Protection oft Start Voltage Ramping Suppression Buit-in High Capacity 15Amp Fuse Specifications: Sensing Input Voltage: 220/400VAC, 1 phase 2 Wire Power Input Voltage:180~240V, 1 phase 2 Wire Output Voltage: Max 90V dc @240V ac input Current: Continuous 6A Intermittent 12A for 10 secs Resistance: Min.10 ohms Max.100 ohms Volts Regulation: Less than±0.5% (with 4% engine governing) Voltage Build-up:Residualvolts at AVR teminalGreater than5VAC Soft Start Ramp Time: 3 seconds External Voltage Adjustment: ±7% with 1 k ohm 1 watt trimmer Unit Power Dissipation: 8 watts maximum Thermal. Drift: 0.05% per °C chage in AVR ambient Under Frequency: 60Hz system presets knee point at 57Hz (Factory Settings) 50Hz system presets knee point at 47Hz Operating Temperature:-40°C to 65°C Storage Temperature:-40°C to 85°C Relative Humidity:Less than95% Package Included: 3 x GAVR-20A Automatic Voltage Regulator 3 x Instructions Only the above package content, other products are not included. Note: Light 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.