Experience high-fidelity audio with the ATH-DSR5BT Wireless In-ear Headphones from Audio-Technica. The engineers at Audio-Technica have utilized multiple technologies to help provide crystal-clear and accurate audio reproduction. They've incorporated their Pure Digital Drive system, which eliminates digital-to-audio conversion, keeping the |digital signal| from source to driver. Dual 9.8mm and 8.8mm dual phase push-pull drivers in each ear are designed to minimize distortion, increase power, and provide clear sound reproduction. These in-ear headphones also support Qualcomm's aptX HD codec for high bitrate audio files.