We are manufacturer, professional Audio speakers. 1, 5-10W 2, 70-100V. 3,100HZ-15KHZ ... ±3dBFrequency response100HZ--15KHzItem dimensions200×500mmNet weight0.92KgWe are manufacturer, professional Audio speakers.1. 5-10W2. 70-100V.3. 100HZ-15KHz.4 ... ..As for the hotels, supermarket, KTV rooms .conference rooms etc.... AUdio spherical speaker