Voltage Range:  6V-12V-24V-50V-120V-230V-400V DC/AC

Frequency Range for AC Voltage Measurements: 50Hz ~ 60Hz

Operating Temperature:  -10℃ ~ 55℃ 

Power Supply:  1.5V button cell, LR44 or equivalent, 2 pieces

IP Degree:  IP54

CAT III 400V