Smart Non-Contact Voltage Tester 12-1000V AC Voltage Detector Meter Tester Pen Sound Alarm Light Indicator With Infrared laser Specification 1.Range Of Voltage Detection:High SensitivityAC12-1000V ; Low sensitivityAC48-1000V; 2.Zero Line And Fire Line Judgment:According to the color change of the backlight: yellow(zero line);Red (Fire Line); 3.Signal Strength Display:Yellow(Weak signal indicator) ; Red (Strong signal indicator); 4.Signal Strength Indicator:When the signal is weak, the buzzer sounds slowly and the yellow light is on; when the signal is strong, the buzzer is rapid and the red light is on; 5.Alarm Method:Sound And Light Alarm; 6.Probe Shape: Prolate shape; 7.Infrared Pointing Light:Yes; 8.Flashlight:Yes; 9.Power Supply: 2x1.5V AAA Batteries(Not included) 10.Safety Rating:CAT. 1000V CAT.600V