This 2021 version of the TC35B adapter consists of a 3.5mm jack connector on one side and a USB Type-C connector on the other. This allows you to connect a 3.5mm jack to a device that only has a USB-C connection. The components are integrated in a compact aluminium alloy housing. The TC35B automatically detects and activates when headphones are connected. The adapter is compatible with CTIA, so it can be used with microphone earphones/earpieces with built-in controls.Apple headphone volume control is not supported!