... Safety Rating: CAT II, 1000V Blue Non-Contact Voltage Detector Pen AC Volt Sensor Tester Alert 90~1000V LED, YFT397A Trade ... for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etcSmall and compact pen design for easy carryingTest Voltage Range: ... sometimes our mail servers have errors. Blue Non-Contact Voltage Detector Pen AC Volt Sensor Tester Alert 90~1000V LED, YFT397A