uxcell&reg; 2 Pcs Auto Car Audio System Loud Speaker Dome Tweeters 4cm Dia 500W Product Name: Dome Tweeter; Material: Plastic Package Content: 2 x Dome Tweeter; Power: 500W Impedance: 4 Ohm; Frequency: 5KHz-20KHz Sensitivity: 105dB/W; Voltage: DC 12V; Color: Black Dimensions: 40 x 40 X 37mm/1.6 x 1.6 x 1.46 inches(L*W*T); Net Weight: 66g