ITEM NAME:AC Voltage Detector 90V~1000V Tester Pen Stick Probe C7W5 AC Voltage Detector 90V~1000V Tester Pen Stick Probe C7W5 Non-contact voltage pen detects from 90V to 1000V AC. LEDs flash if circuit is live (unless lower than 2v). Portable: fits in a pocket for convenience. Non-conductive casing.