LW-D1 LUOWEI Digital Display Curve Ammeter With Universal Brackets, For Mobile Phone Repair and Electronics Testing, Real-time Voltage and Current Fluctuations With High Accuracy. Function: It functions as a digital ammeter and voltage tester, offering high precision for identifying tiny current and voltage fluctuations, which is critical for diagnosing faults in circuit boards. Display: It features a 2.8-inch TFT color LCD screen that uses the LVGL system for a rich and detailed interface. It supports a "dual-page interaction" mode, allowing users to switch between large digital readouts and waveform/curve displays with a single click. Precision: The device can detect voltage changes as small as 0.001V and current changes as small as 0.001A, with an accuracy error of less than 10mV and 10mA. Power: It utilizes an independent isolated power supply design to prevent electrical interference and ensure stability. Application: It is widely used by technicians for professional mobile phone repair, laboratory testing, and electronics maintenance.