Circumference: 43cm (1inch=2.54cm)Length of headphone cable: 29cmLength of data cable: 79cmColor: WhiteNet Weight: 59gModel/MPN: HBS-730Features: Microphone， Playback Controls， Calling Functions， Volume ControlStereo Bluetooth headset for wireless music plus call functionality.Unique around-the-neck design that's lightweight and comfortable for all-day use.Exceptional audio with noise suppression and echo cancellation.Convenient power slide switch.Magnetic ear buds snap into place when not in use; music controls on neck strap.Free BT Reader app (Android OS) reads your incoming text messages in real time.Up to 10 hours of talk time and 15 days of standby time.The (HBS-730) Wireless Stereo Headset is a great Idea for an active enjoyment life. It's Bluetooth headset delivers you powerful bass and high quality audio experience of stereo sound with Bluetooth technology and take call during workout - very easy to do both eliminates tangle wires that drive you crazy. And simply stream music and calls via Bluetooth.