1,Ergonomics Design: The NENRENT S610 Earbud is designed according to ergonomics and the S610 is smallest bluetooth Earbud in Currently, Fits either ear, wear the bud on right ear for better call clarity. 2,Bluetooth issc V4.1 Version:Supports Multipoint Technology Can connect to two different devices in 10 meters range simultaneously. which makes it fit perfectly to your ear and comfortable. Guaranteed to be 100% secure & stable during intense exercise such as running, climbing, riding, camping and other active sports even in a rainy day. 3,Longest Service Time: Built-in high performance rechargeable Lithium-poly 60mAh battery,High capacity battery provides up to 6 hours call time and 4-6hr music playtime at 40-50% volume (adequate for home/office with little noise interference),full charge in around 1-2 hours and up to 130 hours standby time.

ADVANCED ACTIVE NOISE CANCELLING FUNCTION:E7 will be eliminate the noise you don't want to hear,Advanced active noise cancelling technology quells airplane cabin noise, city traffic or a busy office, makes you focus on what you want to hear, it can bring your listening experience and bring you peace of mind. BALANCED SOUND & STRONG BASS :Clear vocals,Precise guitars, excellent Deep bass and crisp percussion that they provides immersive Hi-Fi sound that helps you enjoy your music better.We try our best to provide customers with lifelike sound quality,which is always the goal and constant pursuit of our company . SUPER COMFORTABLE PADDING and STRETCHABLE HEADBAND ：Designed with cushioned, pressure-relieving ear pads that you can have headphones over ear on for hours not feeling your head would explore due to the pressure.Super Protein Earpads and stretchable headband make the headphones fits perfectly and securely on your head .You can adjust to the best angle according to your needs,E7A headphones are great for everyday use!