Features: DSP4450A adopts plug play design and supports 4-channel and 6-channel stereo output. Users only need to connect simply without any complicated installation procedures. Compared with the traditional sound system, this feature greatly reduces the installation difficulty of users and is suitable for car owners who want to simplifies the modification process. Equipped with high performances DSP processor, it can effectively improve the stereo quality and make the sound clearer. This technology solves the problem of poor sound quality of ordinary car stereo, and brings the ultimately auditory enjoyment to users who like music driving. Built-in intelligent cooling system ensures stable performances after long term use and avoids overheating leading to failure. This design meets the needs of car owners who need long-distance driving or playing music for a long time, and improves the durability and reliability of the product. Small size, easy to find the ideal installation position inside the vehicle. This design is especially suitable for small car users with limited space, which does not occupy too much space and can effectively improve the overall sound experience. Specifications: Component:aluminium Size: Approx.135x80x48mm/5.31x3.15x1.89inch Color:Black Voltages range: 9-16V Memory current: 5mA 4 high-level output (4Ohm) RMS=4x50W Signal-to-noise ratio: >80dB Standard distortion: 0.1% Frequency range: 10Hz~20KHz Low pass: 500Hz~20KHz Package Includes: 1pcs Music Amplifier note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.