ITEM NAME:2Pc Tweeters Piezoelectric Tweeter Loudspeaker Ceramic Buzzer Treble Square V9T9 2Pc Tweeters Piezoelectric Tweeter Loudspeaker Ceramic Buzzer Treble Square V9T9 Frequency: 5-20KHz Sensitivity: 91dB Maximum power: 150W Outside diameter: 85 * 85mm Minimum opening size: 75mm Colour: Black material: plastic Package included: 2pcs Audio Speaker.2pcs Audio Speaker. Minimum opening size: 75mm. material: plastic. Maximum power: 150W. Colour: Black.