K1 Wirelesss Bluetooth Easily stow your Ear buds by wearing them around your neck Bluetooth Headset With Built-In Hd Microphone And Cvc 6.0 Noise Cancellation. Hi-Fi Stereo Music Sound The earphone , earbuds physically block external sound. Make you experience sound with bilateral stereo effect Built in HD and Sensitivity microphone. Idea for in car calling or working use. Perfect for Stealth Listening or watching at work.ect for Stealth Listening or watching at work. Intelligent Bluetooth HD calls design, you can enjoy the Bluetooth voice calls even if when do sports activities