I2C C09 Multimeter companion expansion board - Specially designed as an add‑on module to enhance the measurement and diagnostic capabilities of compatible multimeters. High precision measurement module - Provides accurate and stable readings, suitable for voltage, current, and other signal monitoring in electronic projects. I2C interface add‑on board - Uses a standard I2C communication interface for easy connection with microcontrollers, development boards, and data acquisition systems. Digital multimeter test tool extension - Expands the range of test functions, making your multimeter more versatile in lab, repair, and educational applications. Color: As Shown Material: PCB Package Contents: 1*module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.