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 mains electricity test, voltage monitoring of generator and inverter, and other AC circuit voltage test. Features: Compact shape and lightweight, portable to carry and use. There are 2 wires for zero line and firewire, easy to connect, can test directly and no need of power supply. Specification: Measuring Range: 50HZ/60HZ 70-480V 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 Package list: 1 * Cable Electric Shock Warning: Please ask a professional electrician to install this product, in order to avoid electric shock.