Compact, portable electric field meter with digital display for measuring electric fields and electrostatic charges. The measured field strength (V/m) is automatically converted to voltage potential (V) based on the set measurement distance. It is also suitable for testing the performance of ionizers from very low voltages up to 200 V, including "Charge Plate". - Focusing ring made of LED lights to establish an optimal measuring distance - Large LCD display - Rapid repeatable measurements possible via Continuous Mode - Hold Mode to read values even in hard-to-reach places - Digital Zero Mode to set the displayed value to zero - Ion Balance Mode to test the performance of ionizers - 1 FMX-004 electric field meter - 1 user manual