Parameter--- Measuring voltage AC20-500V; current 0-100A; 0.55 Inches LED display. With precise CT--- Volt amperage meter is equipped with CT, no need to buy another. Can be installed on anywhere flexibly. Application--- 2in1 multimeter panel, voltage amperage gauge suitable for indicating signals in the circuits of power, telecommunications, machine tools, etc. Simple connection--- The voltage ampere monitor gauge is powered by the circuit being measured, no need to connect extra power source. Note--- Please note that this volt amp meter is only apply to 50-60Hz AC city electricity Product features Through-hole design: Easy Wiring; Measure positive or negative current; No current direction limitation Electrically is olated from high voltage power source which eliminates risk to delicate monitoring equipment and also minimizes safety concerns Main Specifications: Voltage measuring range: AC20V-500V Current measurement range: AC0-100A Display: 0.55 inch LED digital display Measurement accuracy: 1% + 2 digits Colour:Red+green+yellow Material:Plastic + Metal Package Contents: 1x Red digital Volt Ampere Meter 1x Green digital Volt Ampere Meter 1x Yellow digital Volt Ampere Meter 3 x Current Transfer (CT) 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.