TOCGAMT Wireless Bluetooth Sports Headset Portable Fold Waterproof Neckband In-ear Stereo Headphone Earbud Earphone for Running Gym Exercise Black Ultra light, unique neckband style, sweatproof and anti-dropping, perfect for sport Built-in Apt-x Technology Reproduces Cd Quality Sound Over A Bluetooth Connection 3d Neck behind (around-the-neck Wearing Style With Body-contoured Fit) 8 Hours Of Listening/ Talk Time,300 Hours Of standby time Vibrating Call Alert