Huaham International Version Bluetooth 4.1  Sweat Proof Sports Noise Reduction NFC Magnetic Earphone Yellow Noise Reduction: Support echo cancellation and noise reduction Product Type: Smart sports earphone; Wearing Type: Earbud Charging Time: 2 hours; Call Time: 8-10 hours Functions: Smart APP control, Wireless sports earphone, HIFI sound quality, Remote photo taking, Blu Features: With specially designed smart APP, wireless sports function: exercise track recording and