Technical Specifications: Drivers: 4.5-inch full-range driver Frequency Response: 70 Hz - 17,000 Hz Power Handling: 40W continuous / 160W peak Sensitivity: 88 dB (SPL/1W @ 1m) Impedance: 8 ohms (transformer bypassed) Product Dimensions: 10.7" x 6.8" (Speaker Diameter x Depth) Cutout Dimensions: 8.7" x 6.4" (Back Diameter x Depth) Speaker Weight: 7.7 lbs (3.5 kg) each Product Features: Weather-Resistant Design: Suitable for outdoor installation with IP55 weather resistance. Full-Range Sound: Low-frequency response down to 70 Hz with balanced and uniform sound distribution. Multi-System Support: Compatible with 70/100V systems and adjustable frequency taps with built-in transformers. Easy Installation: Features mounting arms, weather-resistant covers, and secure wire anchor points. Suitable for Public Safety Applications: UL 1480 certified for use in fire alarm and signaling systems. High-quality and clear ceiling speakers For a place that deserves it Offer includes two ceiling speakers, 40 watts per speaker, Bose German.