Gadgetzan Bluetooth Earbuds GZ-E30 by Sports In Ear Hands-free Stereo Headset Noise Cancelling headphones With Microphone/Running/Gym/Exercise/Workout for All Bluetooth-enabled Devices (Green) 1.Noise Cancellation Technology-- .Built-in microphone with CVC6.0 noise cancellation, let you get high quality music, hands-free phone conversation with clear voice even in noisy environment like inside a gym and running/cycling on the road .noise reduction & echo cancellation-effectively reduces surrounding distractions, enjoy noise-free audio performance and HiFi sound effect 2.Sports Design--The earbuds head can be adjust 45 degree. Makes you can find the most comfortable wearing state 3.Secure & Comfortable --Silicon Devices thought about everyone and designed Comfort Sport Earphones to be comfortably used in ears of any shape and size without sacrificing music quality 4.Universal Compatibility--Gadgetzan headphones can work seamlessly with your iPad, iPhone, iPod Touch, Android Smartphones, tablets, Bluetooth-enabled music players and any device with bluetooth connection. 5. Rechargeable Battery--Built-in 80mAh rechargeable battery, up to 6 hours music/talking time. Only need to charging 2 hours.Built-in HD and sensitivity microphone. Support hands-free calling. Makes you can enjoy clear and natural sound ,Allow you answer the phone anytime and anywhereTop-notch Warranty of Gadgetzan provides a 12-month worry-free.