LGYYL Bluetooth V4.1 Wireless Neckband Noise Cancelling In-Ear Magnetic Sport Headsets with Mic - Black NEWEST BLUETOOTH AND SUPER HD SOUND: Advanced Bluetooth V4.1+CSR technology, it work with all smartphones, tablets and music players. It delivers astonishing acoustics and unique automatic voice control for Iphone Siri. Experience realistic stereo digital quality sound on the go, enjoy natural sound and beats with the deep base you crave with the freedom.It works up to 15m Bluetooth range.It can be connected 2 devices at the same time and don't miss your calls when you have 2 phones. SMART MAGNETIC AND NECKBAND DESIGN: It can be fixed firmly in the neck by the neckband.Built-in magnets let you attach the two earbuds together when not using, and wear like a necklace around your neck .Flexible and comfortable ergonomic designed ear hooks to naturally fit the contours of your ear for extended use, interchangeable earbuds to fit different ear sizes, stay put and don't come loose.Built for extreme activities like Running, Jogging, Hiking, Biking, Gym and Water Sport. SWEATPROOF AND LIGHT WEIGHT:Protected your Buds withstand sweaty workouts and will survive accidental dropping into water.Light weight with soft smooth silicone gel ear hooks and tips for extended comfort. SO EASY TO USE: The volume, sound, song selection and telephone controls are all right on the wireless Bluetooth earbuds, it is convenient.Each headphone is equipped with many different types of ear caps. SUGGEST:I would like to suggest that don't buy the used headphones,maybe they were returned back from some buyers that were not good. Our new earbuds are very perfect.We have 18-monthes worry-free warranty and friendly customer service.