Marine Meter with IP42 Shell Protection and 2,000V AC Withstanding Voltage Meter mechanism using magnetic structure of the tensile spring wire support, rotating friction-free, operation reliable Anti-high mechanical impact, operating good under condition of vibration in acceleration: ≤0.7g Instrument accuracy: frequency meter is 0.5, power factor meter is 3.0, others is 1.5 Pointer opening angle: 240 degrees Working environment temperature: -25 to +55°C Shell protection in line with IP42, allows smoke, salt, mold, dust and condensation Withstanding voltage: circuits and shell 2,000V AC/1 minute Insulation resistance: 500V DC/1 minute, 100 meghaohms Surface of white-faced black words, can also be made of black-faced