Headphones Adapter Connecter to 3.5mm Audio Jack Earphone Extender Jack Stereo Supports the full ecosystem of audio headphones and supports up to 24-bit 48khz lossless output. Keep earphones sound quality. Also supports 3.5mm AUX in the car. Built with the same grade materials as premium headphone brands, Features premium digital audio conversion chip delivering a premium audio/sound output. No extra software, you just need to plug and enjoy fidelity sound quality. 100% Copper wire core offers Nondestructive digital sound quality and ensure the stability of the transmission.