High-efficiency dome tweeter. More sound, less energy. Instant setup. Fits anywhere. No magnetic field, tapes and credit cards are safe. Built-in crossover. For All car audio systems. Rated power: 10W Voltage: 12V Maximum audio power: 500W Audio response: 5KHZ-20KHZ Impedance: 4Ω Sensitivity: 91dB : 86dB Magnetic circuit type: Coil Material: plastic Color: Black Package Contents: 8 x Car Tweeter Speakers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the The color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.