August EP640 Bluetooth Wireless Stereo NFC Headphones with 3.5mm Wired Audio In, Rechargeable Battery, NFC Tap To Connect and Built-in Microphone - Black Internal Li Ion Battery - Rechargeable battery gives up to 10 hours between charges Music, Volume and Calls control Buttons - Answer calls & control your music Bluetooth V4.1 Wireless Headphones with NFC, Compatible for Cell Phones, iPhone, iPad, Laptops, Tablets, Smartphones 3.5mm Standard Audio In Socket - Connects to any non Bluetooth device Built-in Microphone - Stay connected to your phone with hands free calling