Product Name: Speaker (BS-3050TS) Model NO.: BS-3050TS Style: Head-mounted Transducer Principle: Piezoceramics Speaker Cone: Paper Cone Transmission Mode: Air-conduction Category: Speaker Trademark: armybeat Origin: China Product Description The wall mountings suplied with enable it to be fitted easily and Flexibly to the wall or optional cluster mounted with the special Bracket for amounting array or where a local background sound withMusic quality is wanted: etc. Like in restaurants, building material Merchants and hotel foyers.BS-3050TSRated taps: 3.75/7.5/15/30W/8ΩLive voltage: 100VSensitivity(1m, 1W): 90± 3dBFrequency response: 130-20KHzDimensions(mm): 230*175*310Material: ABSWeight(kg): 2Speaker units: 5"