Wide measuring rangeVoltage: AC 80~300V, current: AC 0~99.9A, with high accuracy of 1% 2 digits, measurement speed: 2 times per second, Operating temperature: -10~65/14F~149F. Precise CTDigital ammeter voltmeter equipped with 1 precise current transformer. No need to buy another CT. Dual Color DisplayVoltage and current can be displayed with different colors on the LED display, red for voltage, green for current. It's clear and easy to read. Ultra small size2.681.651.5inch / 68x42x38mm. No additional individual power supply, this Voltmeter can be installed anywhere flexibly. More InformationMade of ABS material, this AC ammeter voltmeter is flame retardant for safe use . Note: The AC current meter is only suitable for pure AC 50-60HZ power supply and can NOT be used for square wave, inverter output and modified sine wave sine wave circuit measurement , otherwise the counter will be damaged.