1. Digital multimeter: This power meter measures and displays voltage, current, active power, energy, frequency, and power factor simultaneously. Uses a shunt for easier installation. 2. Overload alarm function: When the measured value exceeds the preset limit, the backlight flashes and an ble alarm sounds. The power limit can be user-defined. 3. Automatic data storage function: In the event of sudden power loss, the most recent measurement data is automatically saved to prevent data loss. 4. One-touch controls: Buttons allow manual control of the backlight, energy reset, and power alarm limit settings. 5. LCD display: Large-screen LCD with 180° viewing angle and manually adjustable blue backlight. Note: PZEM-022 requires an external power supply to illuminate the display. Color: Black Material: ABS Slight variations in appearance and printed text may occur between production batches; these do not affect functionality. Package Contents: 2 × Power monitoring meters Note: Color representation may vary slightly due to lighting conditions and screen settings. Measurement tolerance: ±1–3 cm.