Light Weight and Ergonomic Design Bluetooth Headphone: Ultra light weight does not cause any burden to the ears, thus providing lasting wearing comfort.Up to 9 hours of continuous talking / music time and up to 260 hours of standby with a single charge Hi-Fi Stereo Sound and Hands-free Phone Conversation: Built-in HD Microphone with CVC6.0 noise cancellation,ensure Hi-Fi Stereo Music Sound and Strong Signal.Latest Bluetooth Technology : Easy and fast pairing with smartphones, tablets and other Bluetooth enabled music devices; Offer you impressive dynamic sound. Built-in microphone,10-meter working distance.Compatible with most of Bluetooth devices, including iPhone 6s/6 Plus, iPhone 6s/iPhone6, iPhone 5s/5c/5/4s/4, iPad Mini / iPad Air; Samsung S6 Edge+/S6 Edge/S6/S5, Note 5/4/3, Galaxy Tab Tablets; HTC A9/M9/M8, Google Nexus smartphones, etc.X16 headset is an ergonomic design, Currently used only for the right ear.