Detailed Product Description Indoor ceiling speaker features: 1) Flush mounted in-ceiling, open frame with spring-loaded mounting clamps 2) Red and black push-terminal connectors, metal baffle and grille 3) Available in 3 sizes: 4", 5", 6" 4) Cost effective ceiling speaker, ideal for background music, and paging applications such as schools, hotels, schools, auditoriums, offices, bars, nightclubs, hospital, museums, patios, residential spaces, restaurants, retail stores, theaters, and theme parks 5) Superior sound quality and excellent performance, wider dispersion and smooth off-axis coverage 6) Durable paper cone with damp to produce excellent sound effect 7) Easy, convenient, safe and fast installation Indoor ceiling speaker (T-103 / T-103B / T-103C): 1) Rated power: 3W / 1W / 1W 2) Max. power: 5W / 3W / 3W 3) Line voltage: 70 / 100V 4) Sensitivity: 98dB / 91dB / 91dB 5) Frequency response: 120 - 14KHz / 130 - 13KH / 150 - 13KHz 6) Hole dia.: 130mm / 115 x 115mm / 92mm 7) Net weight: 0.75kg / 0.31kg / 0.31kg Indoor iron ceiling speaker (T-104C / T-105C / T-105CA): 1) Rated power: 3W / 3W / 3W 2) Max. power: 5W / 6W / 6W 3) Line voltage: 70 / 100V 4) Sensitivity: 88dB / 88dB / 98dB 5) Frequency response: 110 - 13KHz / 110 - 14KH / 110 - 16KHz 6) Hole dia.: 160mm / 180mm / 180mm 7) Net weight: 0.8kg / 0.85kg / 0.7kg Indoor ceiling speaker (T-105G / T-105GB / T-107): 1) Rated power: 5W / 5W / 6W 2) Max. power: 8W / 8W / 10W 3) Line voltage: 70 / 100V 4) Sensitivity: 92dB / 90dB / 92dB 5) Frequency response: 110 - 14KHz / 110 - 16KH /100 - 12KHz 6) Hole dia.: 165mm / 165mm / 165mm 7) Net weight: 0.8kg / 0.85kg / 1.35kg