Sony MDR-ZX770DC Bluetooth and Noise Canceling Headphones/Headset With Case - MDRZX770DC (Black) Model# MDR-ZX770DC, No Wires. No Noise, Convenient multi-function design w/Bluetooth & noise cancelling, Bluetooth audio streaming with AAC and aptX support, Convenient One-touch pairing with NFC, Digital Noise Canceling reduces ambient noise Noise-cancelling, Digital noise-cancelling technology reduces ambient noise from the outside, so you hear even more of the music you love. Hands-free calling, Built-in microphone for hands-free phone calling, Rechargeable battery for up to 13hrs music, Passive mode for normal operation without battery. Built for superb sound, 40mm drivers deliver rich, full sound, Beat Response Control for tight bass/transient response, Comfortable swiveling, around the ear design, In the box, 1) MDRZX770DC Headphone, 2) Padded Carrying Case (ZX750DC) 3) Accessory Pouch, 4) 1.5m Stereo Connecting Cable, 5) Micro-USB cable, 6) USB charger,