P.A.SPEAKER BOX2 WAYS SPEAKER BUILT-IN AMPLIFIER VOICE COIL: 3 KSV TWEETER: 1.73 (110X60X15MM) FREQUENCY RESPONSE: 96DB(±2DB) RMS: 180WATTS FREQUENCY RANGE: 40HZ-18KHZ IMPEDANCE: 4 OHMS MAGNET: 170X80X20MM(60 OZ) VOLUME CONTROL VOLTAGE: AC 110-60HZ/220V-50HZ.