This test pen adopts a high-precise chip, quick identification, and accurate measurement. A variety of functional uses to meet different needs. Support 12-300V AC voltage measurement, automatic identification of leakage breakpoints, NCV non-contact voltage sensing, intelligent identification of zeroline and fireline. And with analogue strip, backlight and beep triple alarm, LED flashlight function, and 5 minutes without operation automatically shut down. It can be widely used in homes, offices, power distribution rooms, industrial equipment, circuit maintenance, electronic and digital equipment, etc. Features: Concise Appearance: Compact size and pen-type design make it easy to carry, will not take up too much space, and say goodbye to the traditional heavy and difficult to carry. EBTN Display: EBTN high-definition display, with large font for easy reading of data, and applicable for various measurements in complex environments. Multi-functional Design: Intelligent inductive design, power-on measurement, with a variety of functions to meet different needs. Support 12-300V AC voltage measurement, automatic identification of leakage breakpoints, NCV non-contact voltage sensing, intelligent identification of zeroline and fireline. And with analogue strip, backlight and beep triple alarm, LED flashlight function, environment temperature display and 5 minutes without operation automatically shut down. Alarm Function: According to the sensed signal strength, the buzzer emits alarms at different frequencies, and the green backlight flashes when the signal strength is medium-low grade, and the red backlight flashes when the signal strength is high. NCV Voltage Detection Sensing: NCV mode, when detecting the nearby AC voltage, the LED display lights up the red screen and sends out an alarm beep, no contact power measurement is safer. Intelligent Zeroline Firewire Judgment: Select LIVE Zeroline Firewire distinction function, insert the pen needle into the hole for identification without traditional contact identification, safer power measurement. No sound when recognizing the zerowire; alarm sound when recognizing the fire wire. Route Breakpoint Detection: In NCV non-contact voltage detection mode, single stranded wire charged along the road to exclude the location of the breakpoint. Rechargeable Lithium Battery: Built-in 3.7V, 400mAh lithium-ion battery, USB interface can be charged at any time. LED Flashlight Function: With LED flashlight to help you illuminate and use when measuring in a dim light environment. Multi-purpose Design: It is widely used in homes, offices, power distribution rooms, industrial equipment, circuit maintenance, electronic and digital equipment, etc. Specifications: Name: Electrical Test Pen Material: plastics Battery : 1 * built-in 3.7V, 400mAh battery (included) Alternating current voltage: 12-300V Resolution: 1V Accuracy: ±5.0% Display: EBTN display Sampling rate: 0.5 second Alarm mode: analogue bar, backlight and beep Automatic shut-off time: about 5 minutes Operating temperature and humidity: 0~40, 0~90%RH Storage temperature and humidity: -20~60, 0~75%RH Working altitude: 2000m max Item size: 166 * 28 * 23mm / 6.54 * 1.10 * 0.91in Item weight: 84g / 2.96ounce Package size: 198 * 47 * 26mm / 7.80 * 1.85 * 1.02in Package weight: 109g / 3.84ounce Packing List: 1 * Electrical Test Pen 1 * Cable 1 * Guideline