1. Less than +/-0.5% Reglation 2.220/400 Programmable Input 3.Rugged Compact Design 4.With Under Frequency Protection; Soft Start Voltage Ramping 5.EMI Suppression; Buit-in High Capacity 8Amp Fuse 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 15A Intermittent 20A for 10 secs Resistance: 10 ohms min 100 ohms Max Regulation +/-0.5% RMS with 4% engine governing Voltage Build-up:Residualvolts at AVR teminal 5VAC 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 50Hz system presets knee point at 47Hz Operating Temperature:-40C to + 65C Storage Temperature:-40C to + 85C Relative Humidity: Less than 95% Material:plastic colour:Photo Color Package Contents: 1 * GAVR-20A Automatic Voltage Regulator 1 * English manual 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.