Bluetooth Earbuds,V4.0 Stereo Sports Bluetooth Headphones Noise Reduction Earbuds Wireless Neckband Headset with Microphone Magnetic Holders (Black) Bluetooth 4.0 with Aptx, CSR6835 Chip: 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 APT-X 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.