Ausdom S04 NFC Function Wirelss Bluetooth Sports Headphone In-ear Earbuds Earphone with Built-in Microphone Noise-isolating Sweat-proof for iPhone 6 / 6 plus / 5s / 5, iPad Air / Mini , iPod, Samsung Galaxy Note 4 / Note 3 / S5 / S4, MP3, MP4 and Most Other Bluetooth Enabled Devices for for Cell Phone iPhone Laptop PCBlack+Red) Great sound Bluetooth: wireless technology delivers stereo sound and outstanding clarity while the noise isolating design and built-in microphone and controls make the S04 convenient for all-day use. Long enough time:5.5 hours battery life provides you enough time to enjoy your sport and communication. Functionality :Without the distraction of wires, S04 Bluetooth headset stays locked on your ears, providing incomparable freedom of any workout. Noise isolating in-ear design enables you to listen to more clear and powerful sound, improving audio quality. Special design: S04 with an over-ear design and memory wire conforms to the shape of your ears, allowing you to enjoy an uninterrupted routine without adjusting earphones trouble.