This TC35B adapter consists of a 3.5mm jack female connector on one side and a USB-C male connector on the other side. It will allow you to connect a 3.5mm jack to a device with a USB-C connection only, as it is the case on many recent smartphones. The components are integrated in a compact and robust 316 stainless steel housing. The TC35B automatically detects and activates when a headset is connected. The adapter is also CTIA compatible and can therefore be used with headsets/earphones with integrated controls and microphone.