The Ekahau Sidekick ESK-1 (Sidekick) 

is a professional, portable Wi-Fi measurement device for designing, troubleshooting, and optimizing wireless networks, acting as a powerful accessory for tablets or laptops (iOS/Android/Windows/macOS) with built-in spectrum analysis and dual Wi-Fi radios for accurate data collection. Worn hands-free, it offers faster, more accurate surveys and analysis than traditional methods, capturing interference and providing deep insights for network engineers in small offices to large venues.