["brand new and high quality\nFeatures:\nThe unit has a built in relay, when your stock stereo sends sound to the speakers, this device converts the speaker signal to RCA jacks for your amplifer and at the same for time, it feeds 12 volts to your turn on of your amplifier that it takes from the power side of the amp.\nHigh level speaker signal to low level RCA Adapter\nSpeaker Level to RCA\nHigh to Low Adapter\nVery compact\nOutput level conversion\nHigh degree of separation\nHigh signal to noise ratio\nSuitable for hosts without low frequency (RCA) output (for example: cassette player/card player/C-D/VCD/DVD, etc.) to convert the high frequency of the speaker output to low frequency (RCA) output, which is used to connect the car power amplifier or subwoofer signal enter.\n\nspecification:\nColor:AS showns\nMaterial:plastic\nSize:55*35*30（mm）\nQuantity:1pc\n\nNote: \nPlease allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.\nDue to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!\n\nPackage includes:\n1x High Level Speaker Signal to Low Level RCA Adapter"]