Better sound than the machine, to create a good sound quality. Suitable for most Android car audio system, easy installation, no disconnection. Low distortion, maximum 60w*4 power output, improve the sound quality. HiFI-level chip matching, bringing clear and pleasant high quality music. aluminum housing, good heat dissipation, touch. EQ audio adjustment supports a variety of sound effects such as /rock/classical to meet your music enjoyment. Dc input: 12V-18V 3A Jack input: 1/8 in (standard stereo jack) Speaker impedance: 4-8 ohms Voltage: 12V Output power: 60w*4 EQ adjustment: Supported Sensitivity: 0.25mv-50mv Input impedance: 47K Frequency response: 20Hz-20KHz Colour:Black Material:Metal+plastic Package Contents: 1 x car amplifier 1 x cable 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.