1、With wide testing range, this non-contact voltage tester voltage within AC 12-1000V with high sensitivity, all electric appliances in your family can be tested by it. 2、The voltage pen tester detects voltage in a non-contact way, so do not worry about there could be any possibility of being shocked by the electricity. 3、Great for testing AC cables, circuit breakers, wall sockets, junction boxes, fuses, etc. 4、If the instrument is not operated and no induction signal about 3 minutes, it will turn off automatically. 5、It has flashlight function, convenient to use at night or dark corner. 6、A professional tester, it is perfectly suitable also for DIYers, hobbyists and home owners, it helps you make the first and the most important safety check. 7、Non contact phase sequence detection, after starting up, press the sensitivity/phase sequence/flashlight key for less than 1 second to switch until the display shows the P symbol, and enter the phase sequence detection state. Condition: 100% Brand New 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 1 x Non Contact Voltage Detector 1 x Instruction Manual