Plastic spherical loudspeaker with 6.5“ (165 mm) woofer and 1“ (24 mm) tweeter. Coaxial speaker, 100 V transformer and 8 O power tap, power selector. Wide frequency range, conical sound dispersion. Wire rope in the cable - for safety. Two colour choice. SL 30 spherical loudspeaker is great for covering large areas from high ceiling and is ideal for both speech and background music.