... 90~1000V LED, YFT397A Trade Manager: cnyaixun DescriptionThe voltage detector is designed for electrical testingNon-contact detection, safe ... to useTotally insulated, no exposed metal or conductive partsIdeal for testing AC cables, circuit breakers, wall sockets, junction boxes, ... fuses, etcSmall and compact pen design for easy carryingTest Voltage Range: 90-1000V ACFrequency Range: 50 to 500 HZSafety ...