?Bluetooth 4.0 Wireless Transmission?Support muti-devices connection and single-display monitoring,One mobile end can connect with multiple multimeters, the test object is totally isolated with user to secure their life.This Voltmeter adopts with a large 4 digit(5999) LCD display provides an accurate,and support data retention function. Large display with flashlight--Large display with high brightness ?ashlight. Can implement the test among darkness. ?Not only a multimeter,also a data logger and thermometer.?Real time data are updated and recorded to end user device, no need to be in ?eld. User can de?ne the record time and sampling gap, data can be shown as chart and diagram, multi-devices connection supports data comparison.Chart and Diagram mode helps to analyze the data tendenc.User and test object are totally isolated, which secure the life. ?Necessary Tool for Troubleshoot?This Digital Multimeter designed NCV non-contact voltage sense--While getting the non-contact voltage sensor close to conductor, the instrument will beeps and flash with the frequency according to AC voltage strength.It can be used to measure AC/DC Voltage,AC/DC Current,Resistance,NCV, Frequency,Temperature,Diode,Triode and Continuity testingand more to provide a safety environment for you.This Digital Multimeter is cool, practical, convenient and powerful. ?Humanized design?Voice broadcast secures the test--After installing the TTS voice pack on smartphone, the app supports voice broadcast.This assure the connection safety.Build-in offline record function--No need to put the end device in ?eld, multimeter will save the data in its memory. Use the smartphone to load the data when connected.Ergonomically designed meter body with rubber case for comfortable grip. Non slip, slightly soft plastic case will help with drop protection. ?Widely Used?This Digital Multimeter support NCV non-contact voltage detection, support True RMS value, auto power off function.Test pen storage intimate design.Fits for any electricians, hobbyists, and general household use.Support audion test.Widely supported on Android, iOS, and Windows ?needs optional Bluetooth adaptor?system.