※Please read the profile section before purchasing. This is a 3.5mm stereo mini-plug 3-pole male x 2 to 4-pole female conversion cable. The 4-pole female side specification is CTIA. The total length is approximately 15cm, with 3.5mm connectors on both the male and female sides, and gold-plated connectors. The 3-pole male side has a 3-pole audio plug x 1 and a 3-pole microphone plug x 1. It's difficult to see in the photo, but the 3-pole plug with the green line is for audio, and the 3-pole plug with the red line is for the microphone. Headphone and microphone illustrations are engraved on the handles of each plug. This product is for using 4-pole headsets and earphone microphones with a computer that has an audio output jack and a microphone input jack. Tower-type desktop PCs and older laptops do not have 4-pole jacks, so you can use 4-pole headsets and earphone microphones by using this conversion cable. Connect the audio plug of the conversion cable to the audio output jack of the computer, and connect the microphone plug of the conversion cable to the microphone input jack of the computer. This is a new bulk product, but we have tested it before shipping to avoid initial defects. ※We have multiple units of this product available. If you want multiple units, please write the desired quantity in the comments before purchasing. Discounts are available for multiple purchases. (However, the discount will only be the shipping cost for combined shipping) ●Warranty We will exchange the product for initial defects. Please contact us via the comment section within 14 days of receiving the product. (If we are out of stock, we will cancel the order)