Use the Nikkai USB-C to 3.5mm Headphone Jack / USB-C PD Charging Port Adapter to plug your existing headphones with a 3.5mm jack into your USB-C device. The 3.5mm jack is for audio only, but there is also a USB-C Qualcomm 3.0 Power Delivery 18W Charging Port to charge and sync your device at the same time. This adapter works with all devices that have a USB-C connector, including iPhone or Android smartphones. It is small and discreet in size.