RVZHI Wireless Bluetooth Headphones,Bluetooth 4.1 Earbuds Sport Stereo Headset, Running Headphones/Exercise Bluetooth Earbus, Noise Cancelling Sweat Proof Earphones Ergonomic Design Weight only 4g for each, lightweight and secure, comfortable fit with all shape of ears, give you more convenience and stable when you are running, biking, training, jogging, hiking, exercising, business and relaxation Wide Compatibility & Easy Connect Your DeviceCan be used with all bluetooth enabled mobile phones, Compatible with iPhone X 8 7 6S 6 plus, LG G5 G4 G3, ipod shuffle, ipod nano 7, Samsung Galaxy S7 S6, Huawei, BlackBerry, HTC, iPad Pro, Bluetooth-enabled tablets etc. Simply one press to answer or reject phone calls, Bluetooth pairing, power on and power off, pretty easy to use Quick Charge Box Ensure Long Battery LifeWith portable charging case(500mAh rechargeable battery) a single 50-minutes full charge allows for 90 minutes music time or 10 days of standby time. Never worry about low battery when you are out 100% Money Back Guarantee We offer free lifetime technical support and free replacement or Money Back service. If you have any questions before order or after order, Please feel free to contact us.We will offer you a 100% satisfied solution