Cozify(TM) Wireless Bluetooth 4.1 Earphones Outdoor Sports In-ear Headphones Noise Cancelling Sweatproof Stereo Earbuds with Microphone for iPhone, iPad, iPod, Samsung and More Android Devices (Blue) Superior Technologies: It is engineered with Bluetooth V4.1+EDR technology to free your hand from holding the phone while listening to music or making calls. The connectivity is extremely stable within 33ft. Brilliant noise cancellation technology can filter ambient distracted sound and provide crystal-clear audio Multi-functions: This bluetooth earphone allows you to realize remote control of your devices, such as volume up/volume down, previous track/next track, answer/end calls. Build-in microphone makes your phone call hands-free Build-in Battery: The rechargeable build-in battery is of high performance, less than one and half an hour to get it fully charged. The playing time is up to 8 hours, and standby time is up to 14 days. You will find it is superior to other ordinary ones Universal Compatibility: Work well with iPhone 6/6s, 6 Plus/6s plus, 5 5c 5s 4s,iPad Air, iPad mini, iPad, iPod Touch, Samsung Galaxy Series, Note 3/4, HTC, Sony, Android phones/smartphones, tablets, bluetooth-enabled music players and any devices with bluetooth connection Warranty Guarantee: 1-year 100% worry-free guarantee. Risk free for one year Limited Guarantee! You can enjoy refund or perfect replacement without condition in one year.