?Reliable Service?Standard after-sales service is provided. We have checked the appearance and function of all MAS CARNEY headphone splitters before shipping. If there is any damage, original defect or other defect in transportation, we will provide free product replacement support. If you have any questions about products or purchases, please do not hesitate to contact us. ?Better Compatibility?This earphone splitter compatible with standard USB C music device, including Samsung S22 S21 S20 S20+ Ultra Note 10 20 Ultra, Google 5 4 4 XL 3 3 XL 2 2XL, 2018 i-Pad Pro, K1/U7mini/U7L, Huawei Mate 10 / 10 Pro, P20 / P20 Pro, HTC U11+, Moto Z3, Essential phone, MacBook. ?Plug and Play?No additional charging or audio software required. Just connect your wired headphones / earphones to the jack and enjoy music. NOTE: This usb type-c to 3.5mm adapter dose not support data transfer. ?HiFi Audio?Adopted newest DAC chipset, with latest software, this adapter provides you upto HiFi Audio, brings much more music details for you. NOTE: Please do open "OTG"and "Developer Mode" feature at your "Phone Setting" to avoid sound coming out from phone instead of earphone. ?Mini 2 in 1 Adapter? With this usb c headphone and charger adapter, you can listen music and charging your phone at the same time. This headphone adapter supports music playback and calling for standard USB C devices.