The Direct Sound EXTW37 are a pair of premium-grade wireless headphones featuring a built-in microphone designed for audio professionals. The Direct Sound EXTW37 Wireless Headphones delivers high-definition sound quality thanks to the custom HPA (High Precision Audio) drivers. The driver provides an extended frequency range capturing every detail from your source audio with extreme accuracy. The robust design provides superior isolation providing 37dB of passive attenuation. The EXTW37s also featuring a built-in microphone for answering calls or communicating with artists in the vocal room.