MU16A BLUETOOTH DIGITAL MULTIMETER . BLE 4.0 wireless transmission, more stable, less power consumption (MU16B only) . Chart and Diagram mode helps to analyze the data tendency . 3 5/6 bit resolution, LCD 47x27 mm . Data Logger + Multimeter + Thermometer . Support NCV non-contact voltage sense . True RMS test supported . Widely supported on Android, iOS and Windows . Build-in offline record function supports non-stop up to 7 days non-stop recording Supported functions Auto ranging, Auto/Manual Scale Switch, LCD Backlight, Diode Test, Sleep Mode, Auto Power-off, Continuity Test, Data Hold, Audion Test, True RMS , Input Protection , Relative Measurement Low-battery Indicator