Bluetooth Headphones, V4.0 Wireless Neckband Noise Reducing Headset, Handsfree Stereo Earphones with Microphone Magnetic Holders for Smartphones Sweatproof Earbuds for Sports Running (Green) Bluetooth 4.0, easy and fast pairing with all Bluetooth enabled music evices, simultaneous connection of two mobile phones, never miss any important calls, 15m operation range Unique Silicon Neckband with Magnetic Holders: Sweatproof and ergonomic in-ear design, softable and flexible, perfect for running, doing exercise, gym, fitness, sports etc. HD Stereo & Noise Reduction: Built-in HD Microphone, with excellent sound effect collection, superior sound isolation, provided steady Bluetooth signal and support stereo lossless music. Simple-to-use: Built-in microphone, multifunctional key allows you power on/off, answer/hang up/reject the call, pause and play. Easy to operation. Ultra durable built-in 200mah rechargeable lithium battery provides up to 8 hours music time, 10 hours talk time and up to 16 days standby time, Super cool for longer journey.