Usage Tips:1. Connectors 1: 3.5mm 1/8inch TRRS (4-Pole) Male jack, Connectors 2: AV 4-Pin Screw Terminal Block jack 2. 3.5mm Screw Terminal Block Cable connecting single wires with open cable heads to your 3.5mm jack. 3. 3.5mm trrs jack cable has four total conductors-three signal and a ground as opposed to a more common stereo jack's two. 4. Speaker wire to 3.5mm adapter cable is no soldering required, easy to use, Requires only a screwdriver and a wire stripper to terminate 3.5mm (1/8 Inch)Stereo TRRS Audio cables, Saves time and hassle for installers. 5. Great for devices with 3.5mm (1/8 Inch) Stereo Audio Port microphone, earphone, Speaker, PC and more (1/8 Inch) devices. Product function: You can connect audio cables to mit and extend audio signals. Product male head: Audio 3.5mm 4 section male head Product terminal: 4P terminal Product wiring method: solder-free, terminal screws are fixed. Product applicable equipment: Audio 3.5mm interface audio and video equipment Function: The audio cable can be connected from the outside to mit and expand the audio signal. colour:Black Material: copper size:30cm Package Contents: 1 x Adapter cable Only the above package content, other products are not included. Note: Light shooting 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.