... : 2.4-2.438 GHzSupport for ceiling installationHi-Fi, interference resistanceDC power support, which can be sold all ... compatible with professional amplifier systemWi-Fi Optimization version support working with Wi-Fi network without any interference ... idea.Applicable range: Salon, Supermarket, Hotel, Chain store, Subway station, Dinning-room, conference, church speaker syster and other public, ...