Digital voltage and meter are shown simultaneously measured voltage and in the same instrument. The instrument does not require an additional and the power supply, measurement is very convenient. Feature - ColorBlack - Material: Plastic+LCD+Electronic Component. - Size: 7.9 x 4.3 x 4.8cm - Accuracy: 1% ± 2 words. - Display Mode: voltage and power factor use four red led of 0.32-inch use four red led of 0.32-inch , electric energy use five green led of 0.32-inch. - Range: voltage : 80.0-300. / 200.0-450. (You should select the one type of meter in your order). 0.0-100.0A ( when measure signal lower than 100A, the accuracy is 0.01A, when measure signal higher than 100A, the accuracy is 0.1A, the accuracy auto-change) : 0.0-30000W ( measure voltage 80.0 - 300. ) 0.0-45000W ( measure voltage 200.0 - 450. ) Electric energy: 0.000-99999kwh Power factor: 1.000-0.000 - Speed: 2 times per second. Package list: 1 x Tester 1 x Instructions 1 x Connect Cable