We are manufacturer, professional Wall mini speaker 1, 3-10W 2, 70-100V 3, As usual the class room, hospitals etc... ModelVCS-708Rated power3-10WInput voltage70-100VSensitivity91±3dBFrequency response110-16KHzItem dimensions290×210×130mmWe are manufacturer, professional wall mini speaker1. 3-10W2. 70-100V3. As usual the classroom, hospitals etc..4. More export the south American. south -east asia ...