FNIRSI LC1020E is a portable professional digital LCR bridge tester for accurate measurement of inductance, capacitance and resistance. It adopts digital bridge measurement principle with 4.5-digit dual parameter display and ±0.3% basic measurement accuracy, much higher precision than ordinary multimeters. It supports five adjustable test frequencies: 100Hz,120Hz,1kHz,10kHz,100kHz and three RMS test voltage levels (0.1V/0.3V/0.6V). The meter can automatically identify resistors, capacitors and inductors and switch measurement mode. It displays main parameters (L/C/R/Z) together with secondary parameters including ESR, D (dissipation factor), Q (quality factor) and phase angle θ. Equipped with 3-terminal & 5-terminal Kelvin 4-wire test interface, it effectively eliminates test lead resistance error. It supports open-circuit and short-circuit calibration, tolerance sorting pass/fail judgment, data hold and measurement record functions. Built-in 3000mAh lithium rechargeable battery with Type-C charging for long continuous working time. 2.8-inch TFT color screen, multi-language menu, adjustable screen brightness and auto power-off function. Widely used for circuit maintenance, power supply repair, electronic laboratory teaching, component incoming inspection and DIY electronics projects.