Features High Accuracy Output: Featuring the built-in AD584 module, this product ensures top-notch accuracy and stability for all your electronic projects Versatile Voltage Options: Easily switch between 2.5V, 5V, 7.5V, and 10V outputs from the same port, providing flexibility for various applications User-Friendly : Equipped with a single-key and LED indicator, this module allows for straightforward control of the 4-channel reference voltage output Features: 1、Built‑in AD584 module, with the highest accuracy and stability, reliable to use. 2、The same port can output a reference voltage of 2.5V / 5V / 7.5V / 10V. 3、MCU switch 4‑channel reference voltage output, with LED indicator, single‑key . 4、Voltage reference module, with stable performance, easy to install and use. 5、Using high‑quality PCB board + acrylic material, and long‑lasting. Specification: Item Type: Voltage Reference Module Material: PCB Board+Acrylic Model: AD584 Color: Yellow Measuring Range: 2.5V, 5V, 7.5V, 10V Power Supply: Polymer 503035 500mAh x 1 (Built-In Battery) How to Use: Get the product, turn on the power button, the indicator shows which range, the module test is in which range. Press the middle button of the module again to switch the range. The user can take the test line and insert it into the positive and negative holes for measurement. Package List: 1 x Voltage Reference Module Package List 1 x Voltage Reference Module