Bluetooth Headphones, ZENBRE E3 Bluetooth 4.1 Stereo Earbuds, Wireless Headset Up to 7h Playtime, Sweatproof Noise Isolating with Enhanced Bass (Black) Enhanced Bass, True Stereo Sound PerformanceThe true stereo performance bring a concert around your ears. You can enjoy more brilliant stereo, comfortable treble and powerful bass. It delivers deep bass at lows, and shocked your heart at highs, a soft and beautiful melody at mid. As a wonderful music partner will not fail you at all! Bluetooth 4.1, Fast Connection, Power SavingBLUETOOTH 4.1, made by state-of-the-art Bluetooth chip technology, ensures the connection less than 3s. It will automatically connect to device that has connected once. BUSINESS PARTNER, noise isolated even when you are on the road or in airport lobby, just focusing on what you talking and what you thinking. Enhanced signal, you will found even at 50 feet, still hang with the connection! Sweat-proof, Nice optionWill not worry sweat may ruin the earbuds or the sound performance, even light rain and humidity of the weather. SPORT PARTNER, soft rubber cable connects two earbuds and comfortable when around your neck. Multiple option for various size of buds, just select one which fit your ears perfectly! 7h Continuous Playback, 160h StandbyThe advanced and improved lithium polymer battery allows continuous enjoyment of music for up to 7 hours and 160 hours stand-by. Echo Dot, Universal CompatibilityIt is compatible with Android, IOS, Windows, and it supports all Bluetooth devices such as Echo Dot, smartphone, computer, tablet and so on. A TRICK, surprise that E3 could connect with 2 cellphone at the same time!