KOREA ECO-Friendly product producing UV-C that is NO harm to people & animals and NO mercury used. Experiment proven 13 times more effective to catch Aedes Mosquitoes by Dr Phil Koehler, University of Florida High tech control UV LED wavelength at 365nm that is favourite by mosquitoes. Optimised LED light wavelength with wider coverage up to 20,000 sqft and life span 20,000 hours. Plug and play. NO chemical, mercury bulb or refill required. Capture mosquitoes, insects and flies. Quiet operation of fan (below 28.3dBA Typical) without spark noise.