... kinds of size availableAdopts high precision IC chip design, High Quality,Strong Anti-JammingAdvanced SMT technology and ... segments LEDInput Port Voltage: 5VDC small voltage, not damageMaximum Impedance Resistance: 200MΩModular Output : Relay High Limit Alarm, ... we can supply high quality and serive, offering ammeter, voltmeter, ohmmeter, frenqency meter, tachometer. Intelligent High Impedence Ohmmeter