... Shockproof case Product Features:-Test three phase resistance at the same time, Automatic calculation of three-phase unbalanced rate-Automatic selection ... results, steady, reliable and high accuracy. -Wrong connecting protection for 380V input power supply -Shockproof, anti-interference, suitable ... as per test range -Test Voltage:24Vdc -Input, AC 220V±10%,50Hz±1 Hz, fuse,2A -Working temperature: 0 ...