Ekahau Sidekick is a hardware device designed for use with Ekahau Site Survey, a software tool for designing, analyzing, and optimizing Wi-Fi networks. The Sidekick device is a compact, handheld hardware accessory that provides a high-accuracy GPS receiver and a spectrum analyzer for use in wireless network site surveys. It is used to perform passive and active site surveys to gather information about Wi-Fi network coverage, interference, and other parameters. The data collected by the Sidekick is used to optimize the Wi-Fi network for performance and reliability, and to identify and resolve potential issues before they affect end-user experience. The Ekahau Sidekick is a popular tool among network administrators, Wi-Fi consultants, and IT professionals who are responsible for deploying and maintaining wireless networks.