Audio-Technica YouTube Channel – November 20, 2017
https://www.youtube.com/watch?v=J38rEz_VMIs
The ATH-DSR7BT wireless headphones feature Audio-Technica’s new Pure Digital Drive system, allowing them to operate without the sound-degrading D/A converter found in conventional wireless headphones. The ATH-DSR7BT is equipped with a microphone, volume control and simple tap control for answering/ending calls and playing/pausing music on a smartphone or other device. The headphones’ battery provides approximately 15 hours of continuous use.
Source: ATH-DSR7BT High-Fidelity Wireless Headphones with Pure Digital Drive