Features: Compact shape and lightweight, portable to carry and use. It can measure and show voltage, the measuring range is 50HZ/60HZ 70-380V AC. The voltage meter uses 0.56inch 3-digit LED display, clear to read. There are 2 wires for zero line and firewire, easy to connect, can test directly and no need of power supply. Widely used for AC 220V mains electricity test, voltage monitoring of 220v generator and inverter, and other AC circuit voltage test. Specification: Measuring Range: 50HZ/60HZ 70-480V Input voltage 70-480 (V) Output voltage 70-480 (V) Measuring range 70-480 (V) Operating current: <30mA Measurement rate: 200mS/ time Measurement accuracy: 3% Working temperature: - 10 ~ + 65 ℃ Working humidity: 10-80% (no condensation) Size: Approx. 80x45x27mm / 3.15x1.77x1.06in Mounting opening: 75x39.5mm / 2.95x1.57in Size: Approx. 4.5*3cm/1.8*1.2in Weight: Approx. 40g Options: Red Digit, Yellow Digit, Blue Digit Package list: 1 * Voltage Meter 1 * Cable Electric Shock Warning: Please ask a professional electrician to install this product, in order to avoid electric shock. 1、Compact shape and lightweight, portable to carry and use. 2、It can measure and show voltage, the measuring range is 50HZ/60HZ 70-380V AC. 3、The voltage meter uses 0.56inch 3-digit LED display, clear to read. 4、There are 2 wires for zero line and firewire, easy to connect, can test directly and no need of power supply. 5、Widely used for AC 220V mains electricity test, voltage monitoring of 220v generator and inverter, and other AC circuit voltage test.