The sound effect the machine, creating a shocking and good sound quality .Suitable for most of Android stytem Car Radio Stereo, conveinent intallation without breaking .Low distortion, 80w*4 max power output to improve the sound quality of your machine.HIFI level chip matching bring clear and pleasant high-quality music. aluminum casing with good heat dissipation and delicate metal touch.EQ sound effects adjustment support various sound effects such as /rock/classical music to satisfy your music enjoyment.Model: RY-125ABDC Input: 12V-18V 3AJack Input: 1/8inch(standard stereo jack)Sin Ration: 80dBRated RMS Power: Less than 0.1% at 1KHZSpeaker Impedance: 4-8ohmVoltage: 12VOutput power: 80w*4EQ Adjustment: supportSensitivity: 0.25mv-50mvInput Impedance: 47KFrequency Response: 20Hz-20KHzDue to different product batches, the appearance , which does not affect the use.Colour:BlackMaterial:Metal+plasticPackage Contents:1 x Amplifier box1 cordOnly 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.