About this item 【Ergonomic Neckband & Retractable Earbuds】:Weight only 1.5 oz ultra light and flexible ergonomic neckband, you can wear the headphones on your neck comfortably.Besides,we adopt high quality wire in this retractable system,the wire can be retract more than 5000 times. Premium quality, portable and convenient to use. 【20-Hour Playtime】: Built-in 200 mAh battery, the neckband headphomes allow you to use up to 20 hours, stay immersing in your tasks with your hand and enjoy high-quality audio without worrying about running out of power. 【Call Vibration & CVC 8.0 Noise-Cancelling Mic】:The bluetooth headphones will vibrate when a call comes in so that you won't miss any calls.The built-in CVC8.0 noise-cancelling microphone can reduce background noises so as to provide crystal-clear sound for hands-free calls. 【High-fidelity Sound Quality】:10 mm drivers (20% larger than ordinary earphones) is used to deliver beautiful music to your ears with soft bass and clear treble. The immersive sound will make you feel like you are at a concert. Use advanced Bluetooth 5.0 technology to ensure stable connection and high-speed transmission. 【2-Year Protection Plan for Free】: We don’t want you to pay extra money for any protection plan,check the warranty card,and get your 2-years warranty at no extra cost.Besides,we also provide 90 days worry-free refund and new replacement instead of repairing,offer you a zero-risk purchase.Just feel free to contact with our 7*24 hrs customer service team.