Brand Name: NONE Origin: Mainland China High-concerned chemical: none Signal To Noise Ratio: 88dB Material: metal Impedance: 4ohm Audio Sensitivity: 88dB Speakers Types: Coaxial speakers Item Type: Speakers Special Features: super loud Item Size: 4 inch Model Name: 60W Speakers Certification: NONE Voltage: 12 V Item Weight: 0.57 Car Make: Universal Color Name: YELLOW Out Power: 60W Frequency Range (Hz): 80-20KHz Choice: yes semi_Choice: yes