... when ordering.3, 4/5/6 digit display,with demical point switched automatically;Opical isolation for ... directly.6, Width Power supply:regular: 80-265V AC/DC, others: 12--30V AC/DC indicate when ordering.7 ... Controller, Digital Adjustor,thermocouple (TC and RTD), Panel Meter, Sensor Meter, inductor, Power Meter, Coulometer, Voltage Meter, Ampere Meter, Counter, Tacho Meter, Frequency Meter, flowmeter, ...