Features: 3.5inch LCD Display with Flashlight: The sender of this line finder adopts a large LCD backlight display to give you a better experience and the flashlight allows you to turn it on when the light is low. Multimeter Function (Optional): This function includes direct current and AC voltage and current measurement, resistance, continuity, diode, NCV, temperature measurement. Multifunctional Cable Tester: This cable tester has the function of analogue tracing, cable mapping, PoE voltage measuring, digital tracing volumes and sensitivity adjustable, automatic shutdown, and cable length self-calibration function. Cable Tracing & Signal Changeable: The cable tracing function can quickly and efficiently find the target cable in large number of cables. This function can be used in telephone systems, computers networks, BNC cables and other metal network cables. And support set the frequency for using on tracing. Cable Length & Pairing Check: Able to measure cable length, test open circuit, short circuit, cable sequence and cable break. Voltage Test: Check the polarity and voltage of battery or cellphone lines. Continuity Test (OHM): Check open circuit or short circuit of cellphone lines(cellphone line should not be connected to any power source). Cable Length Test: This function can apply to different metal cables with at least 2 cores including network cables, telephone lines and BNC cables. With the network cable length measuring ranges of 600M. POE Test: POE testing can check cable mapping, polarity and voltage of POE network switches. Specifications: Material: ABS Host: built-in lithium battery, 1250mAh (included) Cable Finding Pen: 1 * 9V battery (NOT INCLUDED) Display: 3.5inch LCD display with white backlight Circuit Break Test