Blue LCD Digital AMP Current Meter Ammeter AC 20A and Current Transformer

Technical Parameters: Operating voltage: AC / DC 8 - 12V Measurement range: AC 0-20A(need external Current Transformer) Operating current: <15mA Display: LCD, Blue backlight, Character height 20mm Dimensions: 79 x 43 x 25 mm Installation hole: 76 x 39 mm Net weight: about 60g Measuring rate: 2 times / S Over-range display: the first shows "1" or "-1" Extreme working conditions: Working temperature: -10 ~ + 50C Operating Humidity: 10 ~ 80% (non-condensing) Working pressure: 80 ~ 106 kPa Sun exposure: no direct exposure