Model Number: 300D piezo horn Tweeter Type : Active, horn speaker Use : Home Theatre, Stage, Auto,Speaker,swallow sound,swiftet farm Special Feature :Mini, Portable Size :103*103*57mm Color :Black Power Rms/Max :75/150W Sensitivity :103dB(1w/1m) Frequency Range :5-25Khz Impedance :4-8 0hm