WHD UP 26-8, 2-Way (Coaxial) Ceiling Speaker System, 20 cm, Power rating: 25/35 W, Impedance: 8 Ohm, Frequency range: 50-18,000 Hz, Without transformer, Very good bass reproduction, Very easy, tool-free installation via mounting ring, Water-resistant cone, Outer diameter: 260 mm, Installation depth: 85 mm,