Bluetooth In-Ear Headphones, Abestbox Wireless Sport Earphones Earbuds (Bluetooth 4.1, Balanced Audio, Build-in Mic, CVC 6.0 Noise-Cancelling) (Blue) A2DP technology, build-in CSR8645 chip with advanced CVC6.0 Noise Reduction tech guarantee a high-quality sound and a clear speech even in a noisy environment. Universal Bluetooth 4.1 (backward compatible) wireless technology. Multi-Point Connection Technology supports simultaneous pairing to two Bluetooth enabled devices at once including iPhones, iPods, iPad, smartphones, Android, tablets, laptop, computer, MP3 media players, and much more. Long battery life,built-in high performance polymer 100mAh battery, about 10 hours talking/playing time, and about 200 hours standby time. This universal in-ear bluetooth headphone for running, sports, music and communication provides you with remarkable sound while blocking outside noise. Friendly designed control makes it easy to manage phone calls, music and volume. Magnetic metal housing keeps earbuds attached together around your neck when not using. Lock-in design, More fit your ears and makes it more comfortable to wear. Handsfree, Good for sporting, high-performance mics deliver. You just need to press on button. Fully sweat-proof: with functional user interface, in-ear heaphones design, and a 15-20 meters working distance, our headphones will let you enjoy music through a variety of activities.