MEE audio EP-X7Plus-BK-MEE Stereo Bluetooth Wireless Sports in-Ear HD Headphones Connectivity Technology: Wireless High-quality wireless in-ear headset designed for active lifestyles Over-the-ear fit with moldable "memory wire" is secure for any activity Bluetooth 4.1 technology with Multipoint and support for aptX and AAC HD audio codecs Sweat-proof design with Liquipel WatersafeTM Technology.Built-in microphone and controls; up to 8 hours of talk/music playback time; 1-year warranty For information on troubleshooting, maintenance, and more please refer to the X7 Plus user manual below.