XCSOURCE Sports Stereo Wireless Bluetooth 3 EDR Earphone Headphones Earbuds Headset IP119 Bluetooth V3.0+EDR Technology: Let you wirelessly connect to the devices, Compatible with Bluetooth-enabled Smart phone/PC/Laptops/Tablet/Desktops. Built-in Microphone:Enhanced microphone allows clear communication. Audio:Excellent sub-bass, mid, and upper treble ranges for enhanced audio quality for listening to music, especially whilst exercising. Secure Fit:There sets of different size earbuds included,from big to small,wearing comfort and secure. Longer Battery Life:Hi-density rechargeable battery built in, delivers up to 4-6 hours music or talk time.