Easy to install, perfect match with the carAllows the addition of 2 or 4- to most stereo syst withoutA output-allows the addition of and subwoofers to existing factory systOrdinary high and low pitch changes have no delay function, so when installing a power amplifier or subwoofer, the control line of the power amplifier is usually selected to receive the ACC line, such as turning on the on, regardle of whether the player is turned on or not, the power amplifier will be energized, sometimes it will power The amplifier generates a porphyrin current shock. The product is played by the player.When the horn is turned on, the horn will work when sending out a signal, and at the same time, it will delay 1 second to control the power amplifier to turn on. Not only can it be used in conjunction with mainframes, but it can also eliminate the effects of current.specification:Applicable models:for most models on the marketColour:brownMaterial:ABSSize:8.5x4.5x2.9cmPackage Contents:1* Audio converterOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the ture a little different from the real thing. The measurement allowed error is +/- 1-3cm.