Which ISM band is most commonly used in the US?

The 915 MHz ISM band is widely utilized in the United States for various applications, particularly in the realm of wireless communications. This band is part of the industrial, scientific, and medical (ISM) frequency range reserved for non-licensed use, which allows for the development and deployment of numerous technologies without the need for obtaining a specific frequency license.

This frequency is especially popular for applications such as RFID, remote controls, and other short-range communications. The 915 MHz frequency benefits from a favorable balance of range and penetration abilities while also avoiding significant interference from other devices, which often proliferate in the higher frequency ranges.

The other listed frequencies have their uses, but they are not as broadly adopted in the United States compared to the 915 MHz band for many industrial and commercial applications. For instance, the 2.4 GHz band is commonly used for Wi-Fi and Bluetooth, while 433.92 MHz is more niche and less standardized for broader applications.