TECHNICAL DATA Diameter: 130 cm. Height: 145 cm. Weight: 60 kg. Internal control panel. Halogen light 20 W. Vibration and shockproof compact disc player. Two loudspeakers, 3 ways, co-axial, 28 - 28'000 Hz, 91 dB. All the electric system functions on low-tension 12 volts direct current. It is powered by an external transformer, and can even work with solar panels, independently of the power line.