COOCHEER Bluetooth Earbuds Wireless Earphones,Noise Cancelling Neckband Bluetooth Headphones,Sport headset Stereo Earphones with Microphone Running Gym Exercise,for Mobile Phones,iPad,iPod etc. AUTO RETRACTABLE EARBUDS: The built-in magnet attracts the earplugs when you don't need them, greatly decreasing the burden on ears and just let it aroud your neck. NOISE CANCELLING TECHNOLOGY: Featuring with CVC6.0 noise cancelling technology, our headphone filters out circuit noise to guarantee high quality sound and provides you clearer voice for calls. POWERFUL REACHARGEABLE BATTERY: Provides up to 14 hours of continuous talking/music time and 350 hours of standby with a single charge. UNIQUE NECK STRAP DESIGN: Made of ultra-light, flexible silicon, great for easy carrying and all day comfort. WIDE COMPATIBILTY: Compatible with all Bluetooth-enabled devices, iOs, Android,smart phones laptops tablets.