Fluke, FLUKE-1AC-A1-II, Electrical Tester Voltage Detector, AC Flat Tip, 90 to 1000 V AC, High Intensity Red LED Indicator, (2) AAA Alkaline Batteries Power Source, Pushbutton Switch, Safety Rating: CAT IV 1000 V, -10 to 50 deg C, 10.24 x 2.95 x 1.18 in Dimensions, Hard Plastic