➀ The IndusVoltmeter is the smallest wireless voltmeter with Wi-Fi capabilities, designed for portability and ease of use. It can measure voltages in two ranges (0-3.3V and 0-24V) and display readings in real time on a webpage. ➁ The device is based on the IndusBoard Coin, which houses the ESP32-S2 chip, and offers a compact design with remote connectivity. ➂ The article provides a detailed guide on designing and building the IndusVoltmeter, including circuit design, programming, and testing.