Zigbee modules are small electronic devices that enable wireless communication between various devices in a network. They use the Zigbee protocol, which is designed for low-power, low-data-rate applications, making them ideal for smart home devices, industrial automation, and sensor networks. These modules can connect multiple devices, allowing them to share information and work together efficiently. Typically, Zigbee modules operate in the 2.4 GHz frequency band and can cover distances of up to 100 meters in open spaces. They are known for their energy efficiency, which helps extend the battery life of connected devices. Zigbee's mesh networking capability allows devices to relay signals, enhancing coverage and reliability in larger areas.