The new HD 350BT is the ideal choice for people that love great audio. Enjoy an engaging sound experience with deep dynamic bass. Quality is by the latest wireless technology including Bluetooth 5. 0 and AAC, AptX codec support, with AptX Low Latency for perfect audio synchronization with videos. The Sennheiser Smart Control App makes it easy to customize the sound via the equalizer or engage podcast mode for improved intelligibility of speech content. The HD 350BT also features an impressive 30-hour battery life that can be rapidly recharged via USB-C. It features a Voice Assistant button for instant Siri and Google Assistant interaction, intuitive physical controls for every day ease of use and a robust folding design for take-anywhere durability.