Phase Rotation Indicator 1.Phase detection (Normal, Reverse) 2.Electricity ... 1.6~16mm,ISO,CE,OEM ETCR1000D Phase Rotation Indicator Our buyers have stayed with us for 12years ... phase]Four lights of phase detection rotate in Clockwise direction, with intermittent short beeps[Reverse phase]Four lights ... . . Field Application ETCR1000D Portable 3 Phase Rotation Indicator --- ISO,CE,OEM services available