Features: aluminum casing with good heat dissipation and delicate metal . The sound effect the machine, creating a shocking and good sound quality . Low distortion, 80wx4 max power output to improve the sound quality of your machine. HIFI level chip matching bring clear and pleasant high-quality music. EQ sound effects adjustment support various sound effects such as /rock/classical music to satisfy your music enjoyment.Suitable for most of Android system Car Radio Stereo, conveinent intallation without breaking . Specification: Model: RY-125AB DC Input: 12V-18V 3A Jack Input: 1/8inch(standard stereo jack) Sin Ration: 80dB Rated RMS Power: 0.1% at 1KHZ Speaker Impedance: 4-8ohm Voltage: 12V Output power: 80wx4 EQ Adjustment: support Sensitivity: 0.25mv-50mv Input Impedance: 47K Frequency Response: 20Hz-20KHz Material: Metal colour: Black Package Contents: 1 x DSP Amplifier box Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.