Feature 1DC Power In: Give you a wonderful in car entertainment.DC power in, suitable for your car. 2Powerful Power: Can connect to 4 speakers, meets the need of most users. 7800w powerful power, providing you with superior thrust. 3Portable: Aluminum alloy casting drawing process, slim design, simple and generous,in line with modern aesthetics. 4Pure Bass: Mini HiFi car amplifier board, 12V strong pure bass, stereo surround sound. 5Low Distortion: Low distortion supplies a clearer, strong and more powerful sound, thermal overload and speaker short circuit protection.Item Type: Car AmplifierProduct Material: Aluminum Alloy, Wire Drawing ProcessWorking Voltage: DC12VFrequency: 20Hz-20kHzSensitivity: 90dbRated Power: 4 x 100WPeak Power: 7800WProduct Size: Approx.35 x 21 x 5cm / 13.8 x 8.3 x 2in .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Car Modified Power Amplifier1 x Fuse4 x Fixing Screw1 xUser Manual