HT100P Non Contact 3 Phase Rotation Indicator AC Voltage Detector Pen Tester with Flashlight Condition: Material: ABS Color: As shown in the picture Operating Environment: Operating Temperature: 0-40 ℃ Storage Temperature: -10-50 ℃ Humidity: 95% Or Less Altitude: ≤2000 M Functional Parameter Accuracy Display Analog bar Voltage detection range High sensitivity AC12—1000V Low sensitivity  AC48-1000V Frequency 50/60HZ Alarm type Sound and light alarm Non contact phase sequence detection Yes Probe shape Flat rectangle Backlight Red and green backlight Live /Null Detection According to Color. Green are Null/ Red are Live Signal strength display Analog bar four-level sensitivity Signal strength indicator The beep sound changes from slow to fast; the backlight color changes from green to red; the analog bar changes from low to high Flashlight Yes Auto power-off No key operation, no sensor signal automatically shuts down after about 3 minutes Battery undervoltage display Yes Power supply 2x1.5V AAA battery(Not included) Weight Approx.33g/1.2oz Size 157x23x26mm / 6.2x0.9x1.0in Safety level EN61010-1, -2-030; EN61326-1, safety level CAT ll1000V