excellent technics, high efficiency and frequency convension design. the shell adopt with high intensity and water-proof, moist-proof and anti-corrosion Rated Impedence: 11ohms Rated Power: 100W Frequency: 350Hz to 9000Hz(-20db) Net Weight: 3.00kg Gross Weight: 3.20kg Carton Size: 210L*140W*210H mm Package: 6pcs/ctn.