Conambo K21 Bluetooth Headset V5.1, Bluetooth Earpiece with CVC 8.0 Dual Mic Noise Cancelling Wireless headset 12Hrs Talking Time Handsfree Headset for iOS Android Cell Phone, Trucker, Office CRYSTAL CLEAR AUDIO：Enjoy clear and consistent call indoor and outdoor. Conambo K21 bluetooth headset features Dual mic CVC8.0 and ENC noise cancelling technology, which Knock out noise around you deliver clear voice. Aerodynamic boom design, optimized your sound. Let you hear and be heard clarity. CONNECTIVITY & COMPATIBILITY: Connect your devices through Bluetooth 5.1and move freely with up to a 33 ft (10 m) range. Headset feature multipoint technology, you’ll enjoy the convenience of having up to two devices connected at once and switching at will. Bluetoot earpiece K21 is compatible with iPhone, Android, and other leading smartphones. ALL DAY COMFORT : Rigorously tested for stability and comfort on a wide range of ear shapes, the wireless headset is comfortable enough to wear all day on your longest calls. Only 0.04lbs / 18g，sleek and pocket-size, K10C hedaset is perfect for on-the-go communication. 9 pieces different sizes ear tips come with the headset for comfortable on a wide range of ear shapes. HANDSFREE: Easy access buttons, K21 Headset let you enjoy real hands-free. Easily mute/unmute with the touch of a dedicated button, long press for activate Siri, Google Assistant to make hands free calls, listen GPS directions or stream multimedia.