TEV TB-700II PA System helps for projecting sound to a large group of people louder than you could by talking or playing an acoustic instrument. The TEV TB-700II features with U-band 16CH waistband transmitter with lavalier or headwear.16 channel selection. This PA system comes with a UHF Band: 650~950MHz (Carrier frequency range is subject to national radio wave regulations). It has a 3P CN Plug and 1.5V (AA) x 2 Battery. The benefit of having a portable speaker is that everything is contained in one unit. As the name suggests, and itâ€™s portable. The new TEV TB-700II PA System has 01-year warranty.