Bluetooth hearing protection for music streaming. Xstream connects to your phone via Bluetooth for wireless music streaming and phone calls. Your hearing is protected while you enjoy your favorite music with excellent sound quality. The built-in microphone allows you to make phone calls. An optional BOOM microphone is available for clearer speech in noisy environments. Side-listening microphones in both ear cups provide excellent directional hearing and a natural sound experience. This allows you to have conversations and hear warning signals or other important information without compromising protection. Features: • Bluetooth • Designed for music • Side-listening function • USB charging system