Bluetooth Headphones Mini Lightweight Wireless Earphones Stereo Music Sport Earbuds Headsets (Bluetooth 4.0, Balanced Audio, Build-in Microphone, CVC 6.0 Noise-Cancelling)--White A840 BLUETOOTH 4.0: You can enjoy high-fidelity stereo music and clear speech within 10 meters. EASY TALKING: Built-in microphone for handsfree calling. NFC FUNCTION: Easy and convenient to connect your headphone with your device. SWEATPROOF DESIGN: Enjoy your workouts without worrying about the earphone working abnormally. WARRANTY: 100% Satisfaction guaranteed. 30-Day Warranty included with each purchase.