What is the ISM band?

ISM (Industrial, Scientific, and Medical) bands are portions of the radio spectrum reserved internationally for non-commercial use in industrial, scientific, and medical applications. The most commonly used ISM bands are: 2.4-2.5 GHz (WiFi, Bluetooth, microwave ovens), 5.725-5.875 GHz (WiFi), and 902-928 MHz (in Americas). These bands are unlicensed, meaning anyone can use them without a specific license, but devices must meet power and emission limits. The shared nature of ISM bands leads to potential interference between different technologies.