NO GARANSI Phase indicator designed to check the presence of open phase and also the phase sequence by rotating disk and lamps. Can check a wide range of 3-phase power source from 110V to 600V. Sealed against dust, the unit ensures trouble-free performance. Small, Light weight and portable. Designed for maximum ease of operation and ruggedness. Operational voltage : 110 - 600V AC Time limit for continuous : gt;500V : within 5 minutes Frequency response : 50/60Hz Applicable standards IEC 61010-1 CAT 600V Pollution degree 2 Withstand Voltage : 5550V AC for 1 minute Dimensions : 106(L) 75(W) 40(D)mm Weight : 350g approx. Cord : 1.5m (R: red S: white T: blue) Accessories : 9029 (Carrying Case) Instruction manual