The voltage indicator WN-711 is used for continuous measurement of voltage in a single-phase network. The range of indicated voltage is from 205 to 245V with a reading accuracy of 2.5V. LED lighting indicates the voltage value described at its height. If two LEDs are lit, the voltage value is the average of the values described at their heights. The voltage value within the tolerance range (215 to 245V) is indicated by the green LEDs, other values are indicated by the red LEDs. Voltage equal to or higher than 250V is indicated by the highest red LED lighting up. Voltage equal to or lower than 200V is indicated by lighting of the lowest red LED.