Pkman&trade;[ Noise Cancelling + APTX Tech] Sport Wireless Bluetooth Headphones/Headset/Earbuds Stereo Running Gym Exercise Headsets Earphones with Hand-free Calling for iPhone and Other Devices Bluetooth V4.0 Technology:The bluetooth signal is more stable and transfer a clear stereo music sound CVC6.0 Noise Cancellation and Compatible with the iphone6,6s,samsung,and other devices A Behind-The-Ear Shape Design:Means whatever the intensity of your workout,you will get the perfect fit Durable and Sweatproof:Wireless earbuds for the Gym,Hiking,Cycling,Jogging,Climbing without annoying cables,locks-in stabilizers offer secure fit for sports and fitness Bluetooth Earbuds Warranty: All of this Headphones,We provide 30 days money back and 1 year warranty,any problems pls directly contact pkman OR Parkman US Online