Turn CD player audio into car stereo playback with a simple wired connection. Use a standard audio cable to connect the car AUX port to the headphone jack on the CD player, and the sound will play through the car speakers. Rechargeable earphones with long battery life. The earphones are rechargeable and provide up to 8 hours of use on a single charge. Clear compatibility and function. Compatible with devices that offer an AUX output and a CD player's headphone jack. This setup enables incar listening without relying on wireless transmission. Performance you can rely on. Wired connection to the car stereo delivers consistent sound through the car speakers, with no reliance on Bluetooth pairing or wireless signal quality. Practical and versatile applications: 1) Incar CD playback during driving. Connect the CD player's headphone jack to the car AUX input to hear audio through the car stereo for shared listening. 2) Inshowroom or workshop testing. Use the car stereo as a playback speaker to quickly verify CD player output without separate headphones. 3) In a parked vehicle for extended sessions. Enjoy music from the CD player via the car speakers while the car is stationary, using the earphones for monitoring if needed.