Measure AccuratelyThis voltage tester can detect voltages: 12V-1000V, and distinguishes them into 3 voltage classes. BEEP will alert low, medium or high sensitivity with different frequency and LED color difference. Buzzer Sound & LuminousThe voltage intensity of electrical tester is displayed on the screen during testing. If the red LED flashes with alarm in rapid rhythm indicates that the firewire is detected. If the red LED does not flash, it means the zero line is detected. SafetyNon-contact testing and insulated pen body ensures safety. It flashes and beeps when the device is near AC voltage. Voltage can be safely detected without the help of an electrician or professional. Non-Contact Voltage TesterInsulated voltage detector housing ensures safety. It flashes and beeps when voltage tester pen is close to AC voltage. Voltage can be safely detected without the help of an electrician or professional. AC Voltage: 12 ~ 1000 V AC Frequency: 50Hz~60Hz Alarm mode: sound and light alarm Flashlight: White LED Auto Shut-Off: Yes Probe Shape: Elongated Low Voltage Indication: Yes Zero Live Wire Judgment: Sound (High, Medium, Low) and LED Lights NCV Sensitivity: Automatically selects 3 sensitivities (High, Medium, Low) NCV sensitivity indication mode: the instrument indicates high, medium and low sensitivity through different alarm sounds and different color LEDs. Power: 2 AAA 1.5V batteries Weight: approx. 45g Size: 156 mm 20 mm 20 mm Security level: EN61010-1, -2-030, EN61326-1, CAT.II 1000V Quantity delivered: 1 piece(with battery)