?Customer Service&Technical Support?- Dear customer, you can contact Shanling if you have any questions, whether it is technical consultation or after-sales service, we will answer you 24 hours a day. And our products provide 1 year maintenance service, we will replace them unconditionally if there are any quality problems in the products. The use of L3 silver foil material can effectively reduce stress and surface effects, making sound transmission more natural, transparent and pure. The height and longitudinal direction of the sound field will be significantly improved, and the imaging will be more accurate, significantly enhancing the spatial performance. Using 8 strands of high-purity Bandung silver foil wire, each with 4 cores, to ensure pure signal transmission and richer sound quality. The L3 is equipped with a classic and universal Type-C interface, which is closely connected to the portable decoding amp and equipment. The reinforced SR lengthened mesh end is not afraid of bending, and has been subjected to repeated 90° violent bending tests without cracking. **********For data transfer only, not for charging.Compatibility:connected to iPhone iPad iOS devices and the portable decoding amp/DAC(SHANLING UA2, UA3, UA5, UP5, H7 and other).