Sub-GHz modules are radio transceivers which use sub 1GHz radio frequencies to transmit and receive RF signals. They are used in a variety of applications, such as communication systems, wireless sensor networks, and digital radio applications like Zigbee and Bluetooth. Sub-GHz modules are also used for applications such as remote control, scanning, and identity tagging. They are typically capable of operating in the range of 86MHz to 928MHz and offer good range and robust performance. They have good interference immunity and low power consumption, allowing for long battery life. Sub-GHz modules are typically designed for low-cost and compact solutions, meaning they are suitable for integration into small, low-power devices.