Feature 1Built in Crossover: Built in crossover can provide flat high frequency response, pitch accuracy and natural sound. 2High Efficiency: This tweeter has the characteristics of high performance, small size and easy assembly. 3High Energy: It is safe without magnetic fields, ribbons, and credit cards. Magnet combined with high energy, used to control moving voice coil. 4Power Rating: Rated for recommended 40 watts of power and 400 watts of maximum power for clear sound. 5Application: The 4 way car speaker is suitable for all car audio systems with outstanding accuracy and output.Item Type: CarAudioTweeterMaterial: ABS + MetalMaximum Power: 400WRated Power: 40WFrequency Response: 80-22000HzImpedance: 4 ohmsSensitivity: 921.5dBApplication: Universal Car Audio SystemPackage List2 x Car Audio Tweeter8 x Screw2 x Connection Line