Sony MDRZX770BN Bluetooth and Noise Canceling Headset (Black) MDR-ZX770BN 4 style :Wireless (Bluetooth) + Digital noise canceling / Wireless (Bluetooth) / Digital noise canceling / Normal headphones Built-in microphone for Hands-free calling Headphones fold flat for compact portability Accurately reproduce the rhythm of the bass sound by Beat response control. Japanese manual only