Features: High sensitivity, High Performances, High Frequency Response. Made of Aluminum material for strong voice performances and great sounding audios. Double output, clear and full of treble, soft and nice to hear, bass calm and powerful, strong. High degree of sound performances, HIFI level experience, stage board to enjoy the stereo surround. Strong and solid, speaker material pragmatic, uniform thickness of the iron frame, to ensure a sound and thick sound. Specifications: Material: Aluminum Color: Silver Installation Diameter: 102mm or 4.01'' Installation depth: 65mm or 2.55'' Impedance: 4 Frequency Range (Hz): 35Hz - 20KHz Sensitivity: 92dB Note: Please allow 1mm errors due to manual measurement. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 2x Car Tweeter