[LED display] 1 meter 3 meters can measure voltage, current, frequency. The large Square LED 3 -bit display provides clear reading.   [Specifications] Voltage: AC 60-500V; current: 0 ~ 100A; frequency: 20-75Hz; working temperature: -20 ~+60 C; accuracy category: ± 5 %   [High -quality and easy to use] The lampshade of the indicator light has a good impact, and it is easy to operate and use it. You only need to pass the load cable through the current transformer.   [Wide application] voltage table can be used as signal instructions for electricity, telecommunications, machine tools, machine tools, ships, textiles, printing and mining machinery.   [Software package ] You will get a 2 % 3 -in -1 voltage index.      Colour:blue   Material:plastic      Package Contents:   2 x electrical tester